fix tests and change to dirname

__tests__/setup-go.test.ts

@@ -85,7 +85,7 @@ describe('setup-go', () => {
     });
     logSpy.mockImplementation(line => {
       // uncomment to debug
-      process.stderr.write('log:' + line + '\n');
+      // process.stderr.write('log:' + line + '\n');
     });
     dbgSpy.mockImplementation(msg => {
       // uncomment to see debug output

src/main.ts

@@ -53,7 +53,7 @@ export async function run() {
     }
 
     // add problem matchers
-    const matchersPath = path.join(process.cwd(), 'matchers.json');
+    const matchersPath = path.join(__dirname, '../..', 'matchers.json');
     core.info(`##[add-matcher]${matchersPath}`);
 
     // output the version actually being used