Fixed parentheses deprecations for elixir 1.4

[leaexplores]

Elixir 1.4 just released lately 🎉

The parentheses are now recommended for method calls without arguments.

This PR fixes the parts where we had deprecations at various areas like so... (See attached code)

Thanks!

warning: variable "package" does not exist and is being expanded to "package()", please use parentheses to remove the ambiguity or change the variable name
  mix.exs:20

warning: variable "deps" does not exist and is being expanded to "deps()", please use parentheses to remove the ambiguity or change the variable name
  mix.exs:22

warning: variable "elixirc_paths" does not exist and is being expanded to "elixirc_paths()", please use parentheses to remove the ambiguity or change the variable name
  mix.exs:46

warning: variable "elixirc_paths" does not exist and is being expanded to "elixirc_paths()", please use parentheses to remove the ambiguity or change the variable name
  mix.exs:47

warning: variable "all_emails" does not exist and is being expanded to "all_emails()", please use parenth
eses to remove the ambiguity or change the variable name
  lib/bamboo/plug/email_preview_plug.ex:38

warning: variable "all_emails" does not exist and is being expanded to "all_emails()", please use parenth
eses to remove the ambiguity or change the variable name
  lib/bamboo/plug/email_preview_plug.ex:41

warning: variable "newest_email" does not exist and is being expanded to "newest_email()", please use par
entheses to remove the ambiguity or change the variable name
  lib/bamboo/plug/email_preview_plug.ex:41

warning: variable "all_emails" does not exist and is being expanded to "all_emails()", please use parenth
eses to remove the ambiguity or change the variable name
  lib/bamboo/plug/email_preview_plug.ex:47

warning: variable "all_emails" does not exist and is being expanded to "all_emails()", please use parenth
eses to remove the ambiguity or change the variable name
  lib/bamboo/plug/email_preview_plug.ex:70

warning: variable "test_process" does not exist and is being expanded to "test_process()", please use par
entheses to remove the ambiguity or change the variable name
  lib/bamboo/adapters/test_adapter.ex:25

warning: variable "verify_phoenix_dep" does not exist and is being expanded to "verify_phoenix_dep()", pl
ease use parentheses to remove the ambiguity or change the variable name
  lib/bamboo/phoenix.ex:105

warning: variable "base_uri" does not exist and is being expanded to "base_uri()", please use parentheses
 to remove the ambiguity or change the variable name
  lib/bamboo/adapters/sendgrid_adapter.ex:64

warning: variable "supervisor_name" does not exist and is being expanded to "supervisor_name()", please u
se parentheses to remove the ambiguity or change the variable name
  lib/bamboo/strategies/task_supervisor_strategy.ex:23

warning: variable "no_halt" does not exist and is being expanded to "no_halt()", please use parentheses t
o remove the ambiguity or change the variable name
  lib/mix/start_email_preview_task.ex:43

warning: variable "iex_running?" does not exist and is being expanded to "iex_running?()", please use parentheses to remove the ambiguity or change the variable name
  lib/mix/start_email_preview_task.ex:47

warning: variable "delivered_emails" does not exist and is being expanded to "delivered_emails()", please use parentheses to remove the ambiguity or change the variable name
  lib/bamboo/test.ex:198

warning: variable "all" does not exist and is being expanded to "all()", please use parentheses to remove the ambiguity or change the variable name
  lib/bamboo/sent_email.ex:91

warning: variable "delivered_emails_as_list" does not exist and is being expanded to "delivered_emails_as_list()", please use parentheses to remove the ambiguity or change the variable name
  lib/bamboo/test.ex:210

warning: variable "flunk_no_emails_received" does not exist and is being expanded to "flunk_no_emails_received()", please use parentheses to remove the ambiguity or change the variable name
  lib/bamboo/test.ex:199

warning: variable "rand_id" does not exist and is being expanded to "rand_id()", please use parentheses to remove the ambiguity or change the variable name
  lib/bamboo/sent_email.ex:116

warning: variable "self" does not exist and is being expanded to "self()", please use parentheses to remove the ambiguity or change the variable name
  lib/bamboo/test.ex:247

warning: variable "all" does not exist and is being expanded to "all()", please use parentheses to remove the ambiguity or change the variable name
  lib/bamboo/sent_email.ex:132

warning: variable "delivered_emails" does not exist and is being expanded to "delivered_emails()", please use parentheses to remove the ambiguity or change the variable name
  lib/bamboo/test.ex:255

warning: variable "refute_timeout" does not exist and is being expanded to "refute_timeout()", please use parentheses to remove the ambiguity or change the variable name
  lib/bamboo/test.ex:279

warning: variable "refute_timeout" does not exist and is being expanded to "refute_timeout()", please use parentheses to remove the ambiguity or change the variable name
  lib/bamboo/test.ex:320

warning: variable "using_shared_mode?" does not exist and is being expanded to "using_shared_mode?()", please use parentheses to remove the ambiguity or change the variable name
  lib/bamboo/test.ex:335

warning: variable "new_email" does not exist and is being expanded to "new_email()", please use parentheses to remove the ambiguity or change the variable name
  test/lib/bamboo/sent_email_test.exs:79

warning: variable "new_email" does not exist and is being expanded to "new_email()", please use parentheses to remove the ambiguity or change the variable name
  test/lib/bamboo/sent_email_test.exs:100

warning: variable "newest_email" does not exist and is being expanded to "newest_email()", please use parentheses to remove the ambiguity or change the variable name
  test/lib/bamboo/plug/email_preview_plug_test.exs:29

warning: variable "new_email" does not exist and is being expanded to "new_email()", please use parentheses to remove the ambiguity or change the variable name
  test/lib/bamboo/phoenix_test.exs:38

warning: variable "newest_email" does not exist and is being expanded to "newest_email()", please use parentheses to remove the ambiguity or change the variable name
  test/lib/bamboo/plug/email_preview_plug_test.exs:30

warning: variable "new_email" does not exist and is being expanded to "new_email()", please use parentheses to remove the ambiguity or change the variable name
  test/lib/bamboo/phoenix_test.exs:43

warning: variable "new_email" does not exist and is being expanded to "new_email()", please use parentheses to remove the ambiguity or change the variable name
  test/lib/bamboo/phoenix_test.exs:48

warning: variable "oldest_email" does not exist and is being expanded to "oldest_email()", please use parentheses to remove the ambiguity or change the variable name
  test/lib/bamboo/plug/email_preview_plug_test.exs:31

warning: variable "new_email" does not exist and is being expanded to "new_email()", please use parentheses to remove the ambiguity or change the variable name
  test/lib/bamboo/phoenix_test.exs:53

warning: variable "self" does not exist and is being expanded to "self()", please use parentheses to remove the ambiguity or change the variable name
  test/lib/bamboo/strategies/task_supervisor_strategy_test.exs:13
warning: variable "new_email" does not exist and is being expanded to "new_email()", please use parenthes
es to remove the ambiguity or change the variable name
  test/lib/bamboo/adapters/mandrill_adapter_test.exs:155

warning: variable "self" does not exist and is being expanded to "self()", please use parentheses to remo
ve the ambiguity or change the variable name
  test/lib/bamboo/adapters/sendgrid_adapter_test.exs:53

warning: variable "new_email" does not exist and is being expanded to "new_email()", please use parenthes
es to remove the ambiguity or change the variable name
  test/lib/bamboo/adapters/sendgrid_adapter_test.exs:73

warning: variable "new_email" does not exist and is being expanded to "new_email()", please use parenthes
es to remove the ambiguity or change the variable name
  test/lib/bamboo/email_test.exs:7

warning: variable "new_email" does not exist and is being expanded to "new_email()", please use parenthes
es to remove the ambiguity or change the variable name
  test/lib/bamboo/email_test.exs:58

warning: variable "new_email" does not exist and is being expanded to "new_email()", please use parenthes
es to remove the ambiguity or change the variable name
  test/lib/bamboo/email_test.exs:75

warning: variable "build_config" does not exist and is being expanded to "build_config()", please use par
entheses to remove the ambiguity or change the variable name
  test/lib/bamboo/adapters/test_adapter_test.exs:16

warning: variable "build_config" does not exist and is being expanded to "build_config()", please use par
entheses to remove the ambiguity or change the variable name
  test/lib/bamboo/adapters/test_adapter_test.exs:16

warning: variable "assert_no_emails_sent" does not exist and is being expanded to "assert_no_emails_sent(
)", please use parentheses to remove the ambiguity or change the variable name
  test/lib/bamboo/adapters/test_adapter_test.exs:79

warning: variable "self" does not exist and is being expanded to "self()", please use parentheses to remo
ve the ambiguity or change the variable name
  test/lib/bamboo/adapters/test_adapter_test.exs:104

warning: variable "assert_no_emails_delivered" does not exist and is being expanded to "assert_no_emails_
delivered()", please use parentheses to remove the ambiguity or change the variable name
  test/lib/bamboo/adapters/test_adapter_test.exs:150

warning: variable "assert_no_emails_delivered" does not exist and is being expanded to "assert_no_emails_
delivered()", please use parentheses to remove the ambiguity or change the variable name
  test/lib/bamboo/adapters/test_adapter_test.exs:177

warning: variable "new_email" does not exist and is being expanded to "new_email()", please use parenthes
es to remove the ambiguity or change the variable name
  test/lib/bamboo/adapters/mandrill_helper_test.exs:7

warning: variable "new_email" does not exist and is being expanded to "new_email()", please use parenthes
es to remove the ambiguity or change the variable name
  test/lib/bamboo/adapters/mandrill_helper_test.exs:24

warning: variable "new_email" does not exist and is being expanded to "new_email()", please use parenthe$
es to remove the ambiguity or change the variable name
  test/lib/bamboo/adapters/mandrill_helper_test.exs:52

warning: variable "new_email" does not exist and is being expanded to "new_email()", please use parenthe$
es to remove the ambiguity or change the variable name
  test/lib/bamboo/adapters/mandrill_helper_test.exs:55

warning: variable "new_email" does not exist and is being expanded to "new_email()", please use parenthe$
es to remove the ambiguity or change the variable name
  test/lib/bamboo/adapters/mandrill_helper_test.exs:60

warning: variable "new_email" does not exist and is being expanded to "new_email()", please use parenthe$
es to remove the ambiguity or change the variable name
  test/lib/bamboo/adapters/mandrill_helper_test.exs:63

warning: variable "get_free_port" does not exist and is being expanded to "get_free_port()", please use $
arentheses to remove the ambiguity or change the variable name
  test/lib/bamboo/adapters/mailgun_adapter_test.exs:23

warning: variable "self" does not exist and is being expanded to "self()", please use parentheses to rem$
ve the ambiguity or change the variable name
  test/lib/bamboo/adapters/mailgun_adapter_test.exs:54

warning: variable "new_email" does not exist and is being expanded to "new_email()", please use parenthe$
es to remove the ambiguity or change the variable name
  test/lib/bamboo/adapters/mailgun_adapter_test.exs:76

[paulcsmith]

Thank you very much! I really appreciate it :)