Move typescriptHelpers out into its own file

* Including it in the standard export actually broke the Angular build; WebPack would try to resolve it and would choke on "child_process".

Author: TimMensch

src/index.ts

@@ -1,3 +1,2 @@
-export * from "./typescriptHelpers";
 export * from "./abstractgenerator";
 export * from "./typescriptgenerator";

typescriptHelpers.ts

@@ -0,0 +1 @@
+export * from "./src/typescriptHelpers";