Changed to semver ;)

Two lines below it states you switch to semver, still there was 1.0... ;)

README.md

@@ -121,7 +121,7 @@ There are some friendly people on [![Gitter](https://badges.gitter.im/Join%20Cha
 Please report _any_ issues to the [Github issue page](https://github.com/y-js/yjs/issues)! I try to fix them very soon, if possible.
 
 ## Changelog
-### 1.0
+### 1.0.0
 This is a complete rewrite of the 0.5 version of Yjs. Since Yjs 1.0 it is possible to work asynchronously on a persistent database, which enables offline support.
 * Switched to semver versioning
 * Requires a promise implementation in environment (es6 promises suffice, included in all the major browsers). Otherwise you have to include a polyfill