fix: make library compatible with TypeScript 2.8

Author: urish

package.json

@@ -29,7 +29,7 @@
     "rimraf": "^2.6.2",
     "ts-jest": "^23.0.0",
     "tslint": "^5.10.0",
-    "typescript": "^2.9.2"
+    "typescript": "~2.8.2"
   },
   "dependencies": {
     "antlr4ts": "^0.4.1-alpha.0"

src/index.ts

@@ -1,12 +1,13 @@
 import { ANTLRInputStream, CommonTokenStream } from 'antlr4ts';
 import { JavaLexer } from './parser/JavaLexer';
-import { JavaParser } from './parser/JavaParser';
+import { CompilationUnitContext, JavaParser } from './parser/JavaParser';
+export { CompilationUnitContext };
 
 /**
  * Parses the given source code and returns the AST
  * @param source Java source code to parse
  */
-export function parse(source: string) {
+export function parse(source: string): CompilationUnitContext {
   const chars = new ANTLRInputStream(source);
   const lexer = new JavaLexer(chars);
   const tokens = new CommonTokenStream(lexer);

yarn.lock

@@ -3521,9 +3521,9 @@ type-check@~0.3.2:
   dependencies:
     prelude-ls "~1.1.2"
 
-typescript@^2.9.2:
-  version "2.9.2"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-2.9.2.tgz#1cbf61d05d6b96269244eb6a3bce4bd914e0f00c"
+typescript@~2.8.2:
+  version "2.8.4"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-2.8.4.tgz#0b1db68e6bdfb0b767fa2ab642136a35b059b199"
 
 uglify-js@^2.6:
   version "2.8.29"