added support for www domain

Author: bahmutov

index.js

@@ -6,6 +6,7 @@ module.exports = function (string) {
   var m = /^([\w-]+)\/([\w-.]+)((?:#|@).+)?$/.exec(string)
   if (m) return format(m)
 
+  string = string.replace('//www.', '//')
   // normalize git@ and https:git@ urls
   string = string.replace(/^git@/, 'https://')
   string = string.replace(/^https:git@/, 'https://')

test.js

@@ -17,6 +17,18 @@ describe('versionless', function () {
       assert.deepEqual(['component', 'emitter', ''], parse(url))
     })
   })
+
+  it('works for www.github.com', function () {
+    var url = 'https://www.github.com/component/emitter'
+    var parsed = parse(url)
+    assert.deepEqual(['component', 'emitter', ''], parsed)
+  })
+
+  it('works for http://www.github.com', function () {
+    var url = 'http://www.github.com/component/emitter'
+    var parsed = parse(url)
+    assert.deepEqual(['component', 'emitter', ''], parsed)
+  })
 })
 
 describe('versioned', function () {