Added semicolon to fix build error
Added semicolon to fix build error

Fix for this error, which occurs when trying to access the app in a
browser:

ERROR in ./scripts/app.js
Module build failed: SyntaxError:
/Users/seb/GitHub/react-svg-smashing/scripts/app.js: A semicolon is
required after a class property (5:29)
3 |
4 | export default class App extends React.Component {
> 5 |   state = { dataSetIndex: 0 }
|                              ^
6 |
7 |   selectDataset(event) {
8 |     this.setState({dataSetIndex: event.target.value});
at Parser.pp.raise
(/Users/seb/GitHub/react-svg-smashing/node_modules/babel-core/node_modul
es/babylon/index.js:1413:13)

somebody32/react-svg-smashing,somebody32/react-svg-smashing