ci: added test coverage

* ci: added test coverage report

* docs: added test, release and go report badges

.github/workflows/test.yml

@@ -20,8 +20,17 @@ jobs:
       - name: Install dependencies
         run: go mod download
 
-      - name: Go Test
-        run: go test -v -cover ./tsort
-
       - name: Go Vet
         run: go vet ./tsort
+
+      - name: Go Test
+        run: go test -v ./...
+
+      - name: Update coverage report
+        uses: ncruces/go-coverage-report@main
+        if: |
+          matrix.os == 'ubuntu-latest' &&
+          github.event_name == 'push'
+        continue-on-error: true
+        with:
+          branch: master

README.md

@@ -1,5 +1,9 @@
 # tfsort
 
+[![badge-gh-release](https://github.com/AlexNabokikh/tfsort/actions/workflows/release.yml/badge.svg)](https://github.com/AlexNabokikh/tfsort/actions/workflows/release.yml/badge.svg)
+[![badge-gh-tests](https://github.com/AlexNabokikh/tfsort/actions/workflows/test.yml/badge.svg)](https://github.com/AlexNabokikh/tfsort/actions/workflows/test.yml/badge.svg)
+[![go-report-card](https://goreportcard.com/badge/github.com/AlexNabokikh/tfsort)](https://goreportcard.com/report/github.com/AlexNabokikh/tfsort)
+
 ![Logo](files/logo.png)
 
 tfsort is a command-line utility that sorts Terraform variables and outputs in a .tf file.