feat: expose paho tls_insecure_set(bool)

[steersbob]

Resolves #227

Adds the tls_insecure kwarg to Client __init__(). If set, the value is forwarded directly to the Paho tls_insecure_set() function.

[codecov]

Codecov Report

Merging #234 (36a8ce5) into main (33a9d9a) will decrease coverage by 0.4%.
The diff coverage is 0.0%.

@@           Coverage Diff           @@
##            main    #234     +/-   ##
=======================================
- Coverage   84.5%   84.1%   -0.4%     
=======================================
  Files          4       4             
  Lines        466     468      +2     
  Branches      86      87      +1     
=======================================
  Hits         394     394             
- Misses        46      47      +1     
- Partials      26      27      +1     

Impacted Files	Coverage Δ
aiomqtt/client.py	82.7% <0.0%> (-0.4%)	⬇️

[frederikaalund]

Hi Bob, thank you for opening this pull request. :)

LGTM! A good showcase of a nice and self-contained first PR. It does decrease our test coverage but I'll allow it. I'll merge this PR as is.

Thank you for your contribution to asyncio-mqtt. 👍