Add support for wl-134

[hobbypunk90]

What does this implement/fix?

This adds support for wl-134.
The wl-134 is a device to read rfid pet tags on 134kHz.

Types of changes

• Bugfix (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)
• Other

Related issue or feature (if applicable): fixes esphome/feature-requests#1675

Pull request in esphome-docs with documentation (if applicable): esphome/esphome-docs#2137

Test Environment

• ESP32
• ESP32 IDF
• ESP8266

Example entry for config.yaml:

uart:
  rx_pin: GPIO17
  baud_rate: 9600
  
text_sensor:
  - platform: wl_134
    name: Transponder Code
    reset: true

Checklist:

• The code change is tested and works locally.
• Tests have been added to verify that the new code works (under tests/ folder).

If user exposed functionality or configuration variables are added/changed:

• Documentation added/updated in esphome-docs.

[probot-esphome]

Hey there @hobbypunk90,
Thanks for submitting this pull request! Can you add yourself as a codeowner for this integration? This way we can notify you if a bug report for this integration is reported.
In __init__.py of the integration, please add:

CODEOWNERS = ["@hobbypunk90"]

And run script/build_codeowners.py

_{^{(message by NeedsCodeownersLabel)}}