add script for updating version in readme

Author: Ruslan Tereshchenko

package.json

@@ -23,7 +23,9 @@
     "lint": "./node_modules/.bin/eslint '**/*.js'",
     "lint:fix": "./node_modules/.bin/eslint '**/*.js' --fix",
     "docs": "./node_modules/.bin/esdoc",
-    "prepublishOnly": "npm install eslint@6.0.1 && npm run lint"
+    "preversion": "npm run lint",
+    "version": "./tools/update-readme.js && npm run docs && git add -A .",
+    "postversion": "git push && git push --tags"
   },
   "devDependencies": {
     "chai": "*",

tools/update-readme.js

@@ -0,0 +1,22 @@
+#!/usr/bin/env node
+'use strict';
+
+const fs = require('fs');
+const { version } = require('../package.json');
+const readme = './README.md';
+
+fs.readFile(readme, 'utf8', (err, data) => {
+  if (err) {
+    console.log(err);
+    return;
+  } else {
+    const result = data.replace(/v[.\d]{5}/, `v${version}`);
+
+    fs.writeFile(readme, result, 'utf8', writeErr => {
+      if (writeErr) {
+        console.log(err);
+        return;
+      }
+    });
+  }
+});