Fix AlertListener on IPv6-aware hosts

[zdimension]

Description

• on many Linux machines, localhost resolves to ::1. The websocket module used here expects an AF_INET address, so it expectedly crashes when passed an IPv6 address such as ::1. The default URL used for reaching Plex is modified to 127.0.0.1 to prevent this.

Issues Fixed or Closed

• Fixes AlertListener does not work with some hosts on Linux #143

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Dependency update (updates to dependencies)
• Documentation update (changes to documentation)
• Repository update (changes to repository files, e.g. .github/...)

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have added or updated the in code docstring/documentation-blocks for new or existing methods/components

Branch Updates

LizardByte requires that branches be up-to-date before merging. This means that after any PR is merged, this branch
must be updated before it can be merged. You must also
Allow edits from maintainers.

• I want maintainers to keep my branch updated

[codecov]

Codecov Report

Merging #201 (8a58d71) into nightly (15099a5) will not change coverage.
The diff coverage is 100.00%.

Additional details and impacted files

@@           Coverage Diff            @@
##           nightly     #201   +/-   ##
========================================
  Coverage    68.97%   68.97%           
========================================
  Files           10       10           
  Lines          735      735           
========================================
  Hits           507      507           
  Misses         228      228           

Flag	Coverage Δ
Linux	68.97% <100.00%> (ø)
Windows	68.97% <100.00%> (+3.26%)	⬆️
macOS	27.75% <100.00%> (-41.23%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
Contents/Code/plex_api_helper.py	53.28% <100.00%> (ø)