Add bump before release

package.json

@@ -22,7 +22,7 @@
     "test": "ava",
     "build": "pkg . --out-path dist -t node8-linux-x64,node8-macos-x64,node8-win-x64",
     "zip": "cd dist && find . -name 'fx-*' -exec zip '{}.zip' '{}' \\;",
-    "release": "rm -rf ./dist && npm run build && npm run zip && release-it --github.release --github.assets=dist/*.zip",
+    "release": "bump && rm -rf ./dist && npm run build && npm run zip && release-it --github.release --github.assets=dist/*.zip",
     "brew:release": "brew bump-formula-pr --url=https://registry.npmjs.org/fx/-/fx-`fx package.json .version`.tgz --no-audit fx",
     "docker:build": "docker build -t antonmedv/fx:latest .",
     "docker:tag": "docker tag antonmedv/fx:latest antonmedv/fx:`fx package.json .version`",
@@ -52,6 +52,7 @@
   "devDependencies": {
     "ava": "^1.4.1",
     "pkg": "^4.3.7",
-    "release-it": "^10.4.0"
+    "release-it": "^10.4.0",
+    "version-bump-prompt": "^5.0.1"
   }
 }