List messages date filters do not work

[ivanmartinvalle]

Issue Summary

I'm trying to download SMS messages using a specific date range. The example listed in the docs here to filter SMS messages by date does not work. Futhermore, changing PageSize doesn't look to be an option, which severely changes the speed of downloading large ranges of messages.

Steps to Reproduce

# following example in the docs...
twilio api:core:messages:list --date-sent-after 2019-08-08
# Error: Unexpected arguments: --date-sent-after, 2019-08-08

# attempting to use --date-sent parameter returned from help...
twilio api:core:messages:list --date-sent ">=2019-08-08" -l debug
# {"DateSent":">=2019-08-08"} issues in the request
# Error code 20001 from Twilio: Invalid date value.

# attempting to page the result...
twilio api:core:messages:list --date-sent 2019-08-08 -l debug
# PageSize=50 issued in the request
# --page-size 50 returns unexpected argument error

Technical details:

• twilio-cli Version:1.4.1
• Node.js Version: 10.16.0

[childish-sambino]

Date range filtering coming soon ...

Fixed by #79

[thinkingserious]

Release is live, thanks for your patience!