bump version and fix ci

Author: anika-apel

.github/workflows/ci.yaml

@@ -17,7 +17,9 @@ jobs:
       - uses: actions/setup-go@v5
         with:
           go-version: ${{ matrix.go }}
-
+      - name: Install Protoc
+        uses: arduino/setup-protoc@v3
+  
       - name: Tests
         run: |
           make test/units test/bench

version.go

@@ -1,4 +1,4 @@
 package gendoc
 
 // VERSION is the version of protoc-gen-doc being used.
-const VERSION = "1.5.1"
+const VERSION = "2.0.0"