Reconnect to Home Assistant if websocket closes

[jacobtomlinson]

No description provided.

[codecov]

Codecov Report

Merging #3 into master will decrease coverage by 2.34%.
The diff coverage is 7.14%.

@@            Coverage Diff             @@
##           master       #3      +/-   ##
==========================================
- Coverage   45.66%   43.31%   -2.35%     
==========================================
  Files           5        5              
  Lines         173      187      +14     
==========================================
+ Hits           79       81       +2     
- Misses         94      106      +12

Impacted Files	Coverage Δ
opsdroid_homeassistant/connector/__init__.py	32.67% <7.14%> (-2.96%)	⬇️

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