chore: add release-it

New releases are created by pushing a tag with semantic versioning (v*)
...

.github/workflows/release.yml

@@ -0,0 +1,16 @@
+on:
+  push:
+    tags:
+      - 'v*'
+
+jobs:
+  release:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+      - run: yarn install
+      - run: yarn run release
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.release-it.json

@@ -0,0 +1,22 @@
+{
+  "git": {
+    "commitMessage": "chore: release ${version}"
+  },
+  "github": {
+    "release": true
+  },
+  "npm": {
+    "publish": false
+  },
+  "plugins": {
+    "@release-it/bumper": {
+      "out": [
+        "package.json",
+        {
+          "file": "publiccode.yml",
+          "path": "softwareVersion"
+        }
+      ]
+    }
+  }
+}

package.json

@@ -10,7 +10,8 @@
     "build-prod": "webpack --config webpack.config.prod.js",
     "test": "jest",
     "deploy": "gh-pages -u 'Deploy Bot <[email protected]>' -d dist",
-    "postinstall": "patch-package"
+    "postinstall": "patch-package",
+    "release": "release-it"
   },
   "keywords": [
     "publiccode",
@@ -29,6 +30,8 @@
     }
   },
   "devDependencies": {
+    "@release-it/bumper": "^3.0.1",
+    "@release-it/conventional-changelog": "^3.3.0",
     "autoprefixer": "^9.4.10",
     "babel-core": "^6.26.3",
     "babel-eslint": "^10.0.1",
@@ -60,6 +63,7 @@
     "patch-package": "^6.2.2",
     "postcss-loader": "^3.0.0",
     "react-test-renderer": "^16.8.6",
+    "release-it": "^14.11.5",
     "sass-loader": "^7.1.0",
     "style-loader": "^0.23.1",
     "url-loader": "^1.1.2",