imports vim module by default.

[sunnyrahul25]

fixes neovim/neovim#11783.

[codecov]

Codecov Report

Merging #430 into master will increase coverage by 1.76%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #430      +/-   ##
==========================================
+ Coverage   71.17%   72.94%   +1.76%     
==========================================
  Files          32       32              
  Lines        2255     2262       +7     
  Branches      210      210              
==========================================
+ Hits         1605     1650      +45     
+ Misses        593      553      -40     
- Partials       57       59       +2

Impacted Files	Coverage Δ
test/test_host.py	100% <100%> (ø)	⬆️
pynvim/plugin/script_host.py	43.01% <100%> (+17.17%)	⬆️
pynvim/api/nvim.py	82.86% <0%> (+1.19%)	⬆️
pynvim/msgpack_rpc/event_loop/asyncio.py	64% <0%> (+5%)	⬆️

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[blueyed]

Thanks!

[justinmk]

Thanks. Perhaps add a test ? https://github.com/neovim/pynvim/blob/master/test/test_host.py

https://github.com/neovim/pynvim#development