chore: Fix Lua coverage reporting from Github Actions (#28)

Author: alerque

.github/workflows/busted.yml

@@ -24,12 +24,14 @@ jobs:
       run: |
         luarocks install --only-deps fluent-scm-0.rockspec
         luarocks install busted
-        luarocks install luacov-coveralls
+        luarocks install https://luarocks.org/manifests/moteus/luacov-coveralls-scm-0.rockspec
         luarocks install luafilesystem
         luarocks install dkjson
     - name: Run Busted Tests
       run: busted -c -v
-    - name: Log coverage to coveralls.io
-      if: matrix.luaVersion == '5.3' && success()
+    - name: Report Test Coverage
+      if: success()
       continue-on-error: true
-      run: luacov-coveralls -i fluent -e spec -v -t "${{ secrets.COVERALLS_TOKEN }}"
+      run: luacov-coveralls
+      env:
+        COVERALLS_REPO_TOKEN: ${{ secrets.GITHUB_TOKEN }}