Update Coveralls action version and fix file parameter in workflows

Author: ishii-norimi

.github/workflows/gh-pages.yml

@@ -30,10 +30,10 @@ jobs:
       - name: Test lib
         run: npm run test:lib -- --bail 1
       - name: Coveralls
-        uses: coverallsapp/github-action@master
+        uses: coverallsapp/github-action@2
         with:
           github-token: ${{ secrets.GITHUB_TOKEN }}
-          files: coverage/clover.xml
+          file: coverage/clover.xml
         continue-on-error: true
   test-js:
     runs-on: ubuntu-latest

.github/workflows/test.yml

@@ -15,10 +15,10 @@ jobs:
       - name: Test lib
         run: npm run test:lib -- --bail 1
       - name: Coveralls
-        uses: coverallsapp/github-action@master
+        uses: coverallsapp/github-action@2
         with:
           github-token: ${{ secrets.GITHUB_TOKEN }}
-          files: coverage/clover.xml
+          file: coverage/clover.xml
         continue-on-error: true
   test-js:
     runs-on: ubuntu-latest