feat(version): increment version supports semver, close #34

Author: bahmutov

README.md

@@ -145,18 +145,22 @@ when running locally
     //registry.npmjs.org/:_authToken=
     [Error: Auth token for registry exists //registry.npmjs.org/:_authToken=]
 
-### increment version
+### increment or set package version
 
-Runs `npm version [major | minor | patch]` command.
+Runs `npm version [major | minor | patch | version]` command.
 
 ```js
 incrementVersion({
-  increment: 'major|minor|patch',
+  increment: 'major|minor|patch|semver version',
   noGit: true // default false = Git commit happens
 })
+// example
+incrementVersion({
+  increment: '2.0.1'
+})
 ```
 
-See `npm help version` - but we only support increments, not absolute values.
+See `npm help version`.
 
 ## Bin commands
 

src/npm-increment-version.js

@@ -7,7 +7,9 @@ var isIncrement = is.oneOf(['major', 'minor', 'patch'])
 
 function npmVersion (opts) {
   la(is.object(opts), 'missing options')
-  la(isIncrement(opts.increment), 'invalid increment', opts)
+  la(isIncrement(opts.increment) ||
+    is.semver(opts.increment), 'invalid increment or version', opts)
+
   var cmd = 'npm version ' + opts.increment
   if (opts.noGit) {
     cmd += ' --no-git-tag-version'