fix: append line feed to end of package.json (#42)

Author: nexdrew

index.js

@@ -61,7 +61,7 @@ conventionalRecommendedBump({
     newVersion = semver.inc(pkg.version, release.releaseAs)
     checkpoint('bumping version in package.json from %s to %s', [pkg.version, newVersion])
     pkg.version = newVersion
-    fs.writeFileSync(pkgPath, JSON.stringify(pkg, null, 2), 'utf-8')
+    fs.writeFileSync(pkgPath, JSON.stringify(pkg, null, 2) + '\n', 'utf-8')
   } else {
     console.log(chalk.red(figures.cross) + ' skip version bump on first release')
   }

test.js

@@ -155,4 +155,13 @@ describe('cli', function () {
     // check annotated tag message
     shell.exec('git tag -l -n1 v1.1.0').stdout.should.match(/chore\(release\): 1\.1\.0/)
   })
+
+  it('appends line feed at end of package.json', function () {
+    writePackageJson('1.0.0')
+
+    shell.exec(cliPath).code.should.equal(0)
+
+    var pkgJson = fs.readFileSync('package.json', 'utf-8')
+    pkgJson.should.equal(['{', '  "version": "1.0.1"', '}', ''].join('\n'))
+  })
 })