fix: parse TypeError etc correctly

In addition to Error, there's also TypeError, RangeError, SyntaxError etc.

Fixes #29

lib/stack-converter.ts

@@ -149,7 +149,7 @@ export class StackConverter {
 
     private static getChromiumErrorLineOrEmpty(stack: string): string {
         const parts = stack.split('\n');
-        if (parts[0].startsWith('Error:')) {
+        if (parts[0].match('Error:')) {
             return parts[0];
         }
 

spec/stack-converter.spec.ts

@@ -95,6 +95,22 @@ describe('StackConverter', () => {
       );
     });
 
+    it('should include exception message in stack', async () => {
+      const baseFile = 'stack-2';
+      const mapFilePath = path.join(TESTING_DATA_DIR, `${baseFile}.js.map`);
+      const stackConverter = new StackConverter([mapFilePath]);
+      const stackFilePath = path.join(TESTING_DATA_DIR, `${baseFile}.txt`);
+      const stackText = readStack(stackFilePath);
+      const { error, stack } = await stackConverter.convert(stackText);
+      expect(error).toBeUndefined();
+      expect(normalize(stack)).toEqual(
+        normalize(
+          `TypeError: Bug.Splat is not a function
+            at TypeError (webpack:///projects/my-angular-crasher/src/app/app.component.ts:33:4)`
+        )
+      );
+    });
+
     it('read in stack trace containing frames from multiple files missing source maps converts stack with errors',  async () => {
       const stackAndSourceMapDir = path.join(TESTING_DATA_DIR, 'dir-multiple-source-map-files');
       const stackConverter = new StackConverter([

spec/test-data/stack-2.txt

@@ -0,0 +1,2 @@
+TypeError: Bug.Splat is not a function
+    at new AppComponent (http://127.0.0.1:8080/stack-2.js:86:20)