Update go.yml

.github/workflows/go.yml

@@ -22,6 +22,14 @@ jobs:
     - name: Check out code into the Go module directory
       uses: actions/checkout@v2
 
+    - name: Install gocv
+      run: |
+        git clone https://github.com/hybridgroup/gocv.git
+        cd gocv
+        make install
+        cd ..
+        echo "Successfully installed gocv!"
+
     - name: Build
       run: make build-linux