feat: improve build system

.github/workflows/test.yml

@@ -6,17 +6,18 @@ on:
   pull_request:
     branches:
       - '**'
+  workflow_dispatch:
 
 jobs:
   test:
     name: Test wireproxy
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: Setting up Go
-        uses: actions/setup-go@v2
+        uses: actions/setup-go@v5
         with:
-          go-version: "1.20"
+          go-version: "1.21"
       - name: Install dependencies
         run: sudo apt install wireguard curl
       - name: Building wireproxy