Add support for getCurrentLocation

[alexvanyo]

This PR adds support for FusedLocationProviderClient.getCurrentLocation which was added in version 17.1.0: https://developers.google.com/android/guides/releases#september_23_2020

One question I had looking at the current implementation, is why not make use of the Play Services integration module from coroutines?

For consistency, I stuck with the current approach with suspendCancellableCoroutine in this PR.

[codecov-io]

Codecov Report

Merging #4 (60cc385) into main (e2224f6) will increase coverage by 0.74%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main       #4      +/-   ##
==========================================
+ Coverage   87.38%   88.13%   +0.74%     
==========================================
  Files           4        4              
  Lines         111      118       +7     
  Branches        5        5              
==========================================
+ Hits           97      104       +7     
  Misses         12       12              
  Partials        2        2              

Impacted Files	Coverage Δ
...src/main/java/com/patloew/colocation/CoLocation.kt	44.44% <ø> (ø)
...main/java/com/patloew/colocation/CoLocationImpl.kt	92.53% <100.00%> (+0.87%)	⬆️

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[patloew]

Thanks for your contribution. Please check the comments.
Will try to use kotlinx-coroutines-play-services for the next release, thanks for pointing it out.

[alexvanyo]

Thanks @patloew !