[Enter steps to reproduce:]

1. ...
2. ...

**Atom**: 1.31.2 x64
**Electron**: 2.0.7
**OS**: Unknown Windows version
**Thrown From**: [language-csharp](https://github.com/atom/language-csharp) package 1.0.4


### Stack Trace

Failed to load a language-csharp package grammar

```
At atom.grammars.startIdForScope is not a function in C:\Users\私の名前\AppData\Local\atom\app-1.31.2\resources\app.asar\node_modules\language-csharp\grammars\csharp.json

TypeError: atom.grammars.startIdForScope is not a function
at grammarCb (/packages/omnisharp-atom/dist/omnisharp-atom.js:145:35)
at Function.module.exports.Emitter.simpleDispatch (~/AppData/Local/atom/app-1.31.2/resources/app/node_modules/event-kit/lib/emitter.js:27:20)
at Emitter.module.exports.Emitter.emit (~/AppData/Local/atom/app-1.31.2/resources/app/node_modules/event-kit/lib/emitter.js:156:34)
at GrammarRegistry.module.exports.GrammarRegistry.addGrammar (~/AppData/Local/atom/app-1.31.2/resources/app/node_modules/first-mate/lib/grammar-registry.js:80:26)
at Grammar.module.exports.Grammar.activate (~/AppData/Local/atom/app-1.31.2/resources/app/node_modules/first-mate/lib/grammar.js:259:54)
at grammarRegistry.readGrammar (~/AppData/Local/atom/app-1.31.2/resources/app/src/package.js:617:53)
at CSON.readFile (~/AppData/Local/atom/app-1.31.2/resources/app/src/grammar-registry.js:514:15)
at parseContents (~/AppData/Local/atom/app-1.31.2/resources/app/node_modules/season/lib/cson.js:123:13)
at ~/AppData/Local/atom/app-1.31.2/resources/app/node_modules/season/lib/cson.js:230:26
at ELECTRON_ASAR.js:537:9
at FSReqWrap.wrapper [as oncomplete] (fs.js:658:17)
at /app.asar/node_modules/language-csharp/grammars/csharp.json:1:1
```