adding caching (#2305)

Author: Azfaar Qureshi

.github/workflows/build-and-test.yml

@@ -49,6 +49,13 @@ jobs:
         run: |
           echo "GOPATH=$(go env GOPATH)" >> $GITHUB_ENV
           echo "$(go env GOPATH)/bin" >> $GITHUB_PATH
+      - name: Restore module cache
+        uses: actions/cache@v2
+        env:
+          cache-name: cache-go-modules
+        with:
+          path: /home/runner/go/pkg/mod
+          key: go-pkg-mod-${{ runner.os }}-${{ hashFiles('./go.mod') }}
       - name: Install tools
         run: make install-tools
       - name: Upload tool binaries