Add tests status badge to README (#79)

Also renamed the corresponding workflow, as "Tests passing"
reads better on the badge than "Test passing".

Author: johnboyes

.github/workflows/test.yml

@@ -1,8 +1,8 @@
 ---
 on: [push]  # yamllint disable-line rule:truthy
-name: Test
+name: Tests
 jobs:
-  test:
+  tests:
     strategy:
       matrix:
         go-version: [1.14.x]
@@ -15,7 +15,7 @@ jobs:
           go-version: ${{ matrix.go-version }}
       - name: Checkout code
         uses: actions/checkout@v2
-      - name: Test
+      - name: Tests
         env:
           INPUT_REPO_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         run: go test ./...

README.md

@@ -1,5 +1,6 @@
 # Label Checker
 
+[![tests](https://github.com/agilepathway/label-checker/workflows/Tests/badge.svg?branch=master&event=push)](https://github.com/agilepathway/label-checker/actions?query=workflow%3ATests+event%3Apush+branch%3Amaster)
 [![reviewdog](https://github.com/agilepathway/label-checker/workflows/reviewdog/badge.svg?branch=master&event=push)](https://github.com/agilepathway/label-checker/actions?query=workflow%3Areviewdog+event%3Apush+branch%3Amaster)
 [![Releases](https://img.shields.io/github/release/agilepathway/label-checker/all.svg?logo=github
 )](https://github.com/agilepathway/label-checker/releases)