Avoid swallowing JSON5 error output

src/index.js

@@ -12,7 +12,7 @@ function Json5Loader(source) {
   try {
     value = JSON5.parse(source);
   } catch (e) {
-    throw new Error('Error parsing JSON5', (e));
+    this.emitError(e);
   }
 
   return `module.exports = ${util.inspect(value, { depth: null })}`;

test/json5-loader.test.js

@@ -15,11 +15,14 @@ describe(PROJECT_NAME, () => {
     done();
   });
 
-  test('should catch invalid JSON5', (done) => {
+  test('should handle invalid JSON5', (done) => {
     const brokenJson5 = '{broken: json5}';
-    expect(() => {
-      Json5Loader.call({}, brokenJson5);
-    }).toThrow('Error parsing JSON5');
+    const emitError = jest.fn();
+
+    Json5Loader.call({
+      emitError,
+    }, brokenJson5);
+    expect(emitError).toHaveBeenCalledWith(expect.any(SyntaxError));
     done();
   });