Support scoped packages for cra --scripts-version option (#4677)

Author: Jack Zhao

packages/create-react-app/createReactApp.js

@@ -214,7 +214,9 @@ function createApp(name, verbose, version, useNpm, template) {
  if (!semver.satisfies(process.version, '>=6.0.0')) {
  console.log(
  chalk.yellow(
- `You are using Node ${process.version} so the project will be bootstrapped with an old unsupported version of tools.\n\n` +
+ `You are using Node ${
+ process.version
+ } so the project will be bootstrapped with an old unsupported version of tools.\n\n` +
  `Please update to Node 6 or higher for a better, fully supported experience.\n`
  )
  );
@@ -228,7 +230,9 @@ function createApp(name, verbose, version, useNpm, template) {
  if (npmInfo.npmVersion) {
  console.log(
  chalk.yellow(
- `You are using npm ${npmInfo.npmVersion} so the project will be boostrapped with an old unsupported version of tools.\n\n` +
+ `You are using npm ${
+ npmInfo.npmVersion
+ } so the project will be boostrapped with an old unsupported version of tools.\n\n` +
  `Please update to npm 3 or higher for a better, fully supported experience.\n`
  )
  );
@@ -409,7 +413,7 @@ function getInstallPackage(version, originalDirectory) {
  if (validSemver) {
  packageToInstall += `@${validSemver}`;
  } else if (version) {
- if (version[0] === '@') {
+ if (version[0] === '@' && version.indexOf('/') === -1) {
  packageToInstall += version;
  } else if (version.match(/^file:/)) {
  packageToInstall = `file:${path.resolve(