chore(cli-plugin-typescript): fix typo (vuejs#1447)

Author: kazupon

packages/@vue/cli-plugin-typescript/index.js

@@ -24,7 +24,7 @@ module.exports = (api, options) => {
  loader: 'cache-loader',
  options: api.genCacheConfig('ts-loader', {
  'ts-loader': require('ts-loader/package.json').version,
- 'typescript': require('typescript/package.json').versiono
+ 'typescript': require('typescript/package.json').version
  }, 'tsconfig.json')
  })