[v6] fixes broken lifecycle.js (#1699)

* resumes broken lifecycle.js

* add back componentDidMount in lifecycle.js

.gitignore

@@ -9,3 +9,4 @@ react-table.css
 .idea
 .DS_Store
 .history
+.vscode

src/lifecycle.js

@@ -1,9 +1,7 @@
 export default Base =>
   class extends Base {
-    constructor (props) {
-      super(props)
-
-      this.state = this.calculateNewResolvedState(this.getDataModel(this.getResolvedState(), true))
+    UNSAFE_componentWillMount () {
+      this.setStateWithData(this.getDataModel(this.getResolvedState(), true))
     }
 
     componentDidMount () {