fix: propagating a downstream fix on typescript
Replace property access on objects with an index signature type, with an index access.
Previously, you could write:
```
interface IdxSig {
[key: string]: string;
}
function propAccess(x: IdxSig) {
x.prop;
}
```
@@ -30,7 +30,7 @@ import * as ts from 'typescript';
import * as indexer from './indexer';
-const KYTHE_PATH = process.env.KYTHE || '/opt/kythe';
+const KYTHE_PATH = process.env.['KYTHE'] || '/opt/kythe';
/**
* createTestCompilerHost creates a ts.CompilerHost that caches its default
