FIx CI

Author: lixin9311

.github/workflows/build.yml

@@ -28,4 +28,4 @@ jobs:
       run: go build -v .
 
     - name: Test
-      run: go get . && go get -u -v github.com/shadowsocks/v2ray-plugin && ./script/test.sh
+      run: export PATH="$(go env GOPATH)/bin:$PATH" && go get . && go get -u -v github.com/shadowsocks/v2ray-plugin && ./script/test.sh