add github tasks for codecov

Author: trajinthan

.github/workflows/build-master.yml

@@ -40,6 +40,8 @@ jobs:
             name: Code Coverage JSON
             path: regex-ballerina/target/report/test_results.json
             if-no-files-found: ignore
+      - name: Generate CodeCov Report
+        uses: codecov/codecov-action@v1
       - name: Dispatch Dependent Module Builds
         if: github.event.action != 'stdlib-publish-snapshot'
         run: |

.github/workflows/pull-request.yml

@@ -35,7 +35,9 @@ jobs:
             name: Code Coverage JSON
             path: regex-ballerina/target/report/test_results.json
             if-no-files-found: ignore  
-
+      - name: Generate CodeCov Report
+        uses: codecov/codecov-action@v1
+        
   windows-build:
 
     runs-on: windows-latest