Bump mechanize from 2.7.2 to 2.7.7

Bumps [mechanize](https://github.com/sparklemotion/mechanize) from 2.7.2 to 2.7.7.
- [Release notes](https://github.com/sparklemotion/mechanize/releases)
- [Changelog](https://github.com/sparklemotion/mechanize/blob/master/CHANGELOG.rdoc)
- [Commits](sparklemotion/mechanize@v2.7.2...v2.7.7)

Signed-off-by: dependabot[bot] <support@github.com>

Gemfile.lock

@@ -70,6 +70,7 @@ GEM
       execjs
     coffee-script-source (1.7.1)
     colored (1.2)
+    connection_pool (2.2.5)
     crack (0.4.2)
       safe_yaml (~> 1.0.0)
     cucumber (1.3.15)
@@ -87,7 +88,7 @@ GEM
     database_cleaner (1.3.0)
     diff-lcs (1.2.5)
     docile (1.1.5)
-    domain_name (0.5.19)
+    domain_name (0.5.20190701)
       unf (>= 0.0.5, < 1.0.0)
     erubis (2.7.0)
     execjs (2.2.1)
@@ -105,7 +106,7 @@ GEM
     gherkin (2.12.2-java)
       multi_json (~> 1.3)
     hike (1.2.3)
-    http-cookie (1.0.2)
+    http-cookie (1.0.4)
       domain_name (~> 0.5)
     i18n (0.6.11)
     jquery-rails (2.3.0)
@@ -122,31 +123,37 @@ GEM
     mail (2.5.4)
       mime-types (~> 1.16)
       treetop (~> 1.4.8)
-    mechanize (2.7.2)
+    mechanize (2.7.7)
       domain_name (~> 0.5, >= 0.5.1)
-      http-cookie (~> 1.0.0)
-      mime-types (~> 1.17, >= 1.17.2)
+      http-cookie (~> 1.0)
+      mime-types (>= 1.17.2)
       net-http-digest_auth (~> 1.1, >= 1.1.1)
-      net-http-persistent (~> 2.5, >= 2.5.2)
-      nokogiri (~> 1.4)
+      net-http-persistent (>= 2.5.2)
+      nokogiri (~> 1.6)
       ntlm-http (~> 0.1, >= 0.1.1)
+      webrick (~> 1.7)
       webrobots (>= 0.0.9, < 0.2)
     mime-types (1.25.1)
-    mini_portile (0.6.0)
+    mini_portile2 (2.6.1)
     minitest (5.4.0)
     mono_logger (1.1.1)
     multi_json (1.10.1)
     multi_test (0.1.1)
     mysql2 (0.3.18)
-    net-http-digest_auth (1.4)
-    net-http-persistent (2.9.4)
-    nokogiri (1.6.2.1)
-      mini_portile (= 0.6.0)
-    nokogiri (1.6.2.1-java)
+    net-http-digest_auth (1.4.1)
+    net-http-persistent (4.0.1)
+      connection_pool (~> 2.2)
+    nokogiri (1.12.5)
+      mini_portile2 (~> 2.6.1)
+      racc (~> 1.4)
+    nokogiri (1.12.5-java)
+      racc (~> 1.4)
     ntlm-http (0.1.1)
     polyglot (0.3.5)
     rabl (0.10.1)
       activesupport (>= 2.3.14)
+    racc (1.5.2)
+    racc (1.5.2-java)
     rack (1.5.2)
     rack-protection (1.5.5)
       rack
@@ -268,13 +275,14 @@ GEM
     unf (0.1.4)
       unf_ext
     unf (0.1.4-java)
-    unf_ext (0.0.6)
+    unf_ext (0.0.8)
     vegas (0.1.11)
       rack (>= 1.0.0)
     webmock (1.21.0)
       addressable (>= 2.3.6)
       crack (>= 0.3.2)
-    webrobots (0.1.1)
+    webrick (1.7.0)
+    webrobots (0.1.2)
     xml-simple (1.1.9)
       rexml
     xpath (2.0.0)