fix: print current version at startup (#64)

It's currently hard to see what versions the tests are at, so print this
at startup so we don't have to guess.

Author: rix0rrr

packages/@aws-cdk-testing/cli-integ/lib/cli/run-suite.ts

@@ -101,6 +101,7 @@ async function main() {
 
   console.log(`Package source: ${packageSource.description}`);
   console.log(`Test suite:     ${suiteName}`);
+  console.log(`Test version:   ${thisPackageVersion()}`);
 
   await packageSource.prepare();
   serializeForSubprocess(packageSource);
@@ -133,6 +134,11 @@ async function main() {
   }
 }
 
+function thisPackageVersion(): string {
+  // eslint-disable-next-line @typescript-eslint/no-require-imports
+  return require('../../package.json').version;
+}
+
 main().catch(e => {
   // eslint-disable-next-line no-console
   console.error(e);