conf: code-climate coverage (#88)
conf: code-climate coverage (#88)

Closes: #87

# Goal
Fix coverage metrics by migrating to Code Climate.

# Approach
1. Adapt [GitHub's example](https://github.com/marketplace/actions/code-climate-test-reporter).
2. Remove `pull_request` run to avoid [duplication](https://github.com/FoveaCentral/google_maps_geocoder/pull/85).

Signed-off-by: Roderick Monje <f9f03903429036ef609ed7ca822fddfa76155c29@foveacentral.com>

ivanoblomov/google_maps_geocoder