Set development version number

RELEASING.md

@@ -57,9 +57,10 @@ $  git push origin -f release vA.B.C
 $  git checkout develop
 ```
 
-- Increment version number and add `-dev` suffix in `package.json`, e.g. `2.25.0-dev`
+Add section in `CHANGELOG.md` for new version number (e.g. `# Unreleased (2.28.0-dev)`).
 
 ```bash
+$  npm version --no-git-tag-version vAA.BB.0-dev
 $  git add . && git commit -m 'Set development version number'
 $  git push origin develop
 ```

package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "iD",
-  "version": "2.27.0",
+  "version": "2.28.0-dev",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "iD",
-      "version": "2.27.0",
+      "version": "2.28.0-dev",
       "license": "ISC",
       "dependencies": {
         "@mapbox/geojson-area": "^0.2.2",

package.json

@@ -1,6 +1,6 @@
 {
   "name": "iD",
-  "version": "2.27.0",
+  "version": "2.28.0-dev",
   "description": "A friendly editor for OpenStreetMap",
   "main": "dist/iD.min.js",
   "repository": "github:openstreetmap/iD",