add release-it for release management

Author: ugogo

.env.example

@@ -0,0 +1 @@
+GITHUB_TOKEN=""

.release-it.json

@@ -0,0 +1,8 @@
+{
+  "git": {
+    "commitMessage": "release v${version}"
+  },
+  "github": {
+    "release": true
+  }
+}

package.json

@@ -12,7 +12,8 @@
     "node": ">=10"
   },
   "publishConfig": {
-    "registry": "https://npm.pkg.github.com/"
+    "registry": "https://npm.pkg.github.com/",
+    "access": "public"
   },
   "scripts": {
     "build": "microbundle-crl --no-compress --format modern,cjs --css-modules false",
@@ -24,7 +25,8 @@
     "test:unit": "cross-env CI=1 react-scripts test --env=jsdom",
     "test:watch": "react-scripts test --env=jsdom",
     "predeploy": "cd example && yarn install && yarn run build",
-    "deploy": "gh-pages -d example/build"
+    "deploy": "gh-pages -d example/build",
+    "release": "npm run test && npm run prepare && dotenv release-it"
   },
   "peerDependencies": {
     "react": "^16.0.0"
@@ -39,9 +41,9 @@
     "@types/react-dom": "^16.9.7",
     "@typescript-eslint/eslint-plugin": "^2.26.0",
     "@typescript-eslint/parser": "^2.26.0",
-    "microbundle-crl": "^0.13.10",
     "babel-eslint": "^10.0.3",
     "cross-env": "^7.0.2",
+    "dotenv-cli": "^3.1.0",
     "eslint": "^6.8.0",
     "eslint-config-prettier": "^6.7.0",
     "eslint-config-standard": "^14.1.0",
@@ -53,11 +55,13 @@
     "eslint-plugin-react": "^7.17.0",
     "eslint-plugin-standard": "^4.0.1",
     "gh-pages": "^2.2.0",
+    "microbundle-crl": "^0.13.10",
     "npm-run-all": "^4.1.5",
     "prettier": "^2.0.4",
     "react": "^16.13.1",
     "react-dom": "^16.13.1",
     "react-scripts": "^3.4.1",
+    "release-it": "^13.6.3",
     "typescript": "^3.7.5"
   },
   "files": [