fix: add terminal newline to tsconfig.json

Fixes: #68

Author: ofrobots

src/init.ts

@@ -116,7 +116,8 @@ async function writePackageJson(
   options.logger.log('Writing package.json...');
   if (!options.dryRun) {
     try {
-      await write('./package.json', JSON.stringify(packageJson, null, '  '));
+      const jsonString = JSON.stringify(packageJson, null, '  ');
+      await write('./package.json', `${jsonString}\n`);
     } catch (err) {
       throw err;
     }