feat(ui): enforce package.json npm rules (#3232)

Author: hamedbaatour

packages/@vue/cli-ui/apollo-server/connectors/projects.js

@@ -281,7 +281,7 @@ async function create (input, context) {
 
     const inCurrent = input.folder === '.'
     const name = inCurrent ? path.relative('../', process.cwd()) : input.folder
-    creator.name = name
+    creator.name = name.toLowerCase()
 
     // Answers
     const answers = prompts.getAnswers()

packages/@vue/cli-ui/src/util/folders.js

@@ -1,5 +1,5 @@
 export function isValidName (name) {
-  return !name.match(/[/@\s+%:]/) && encodeURIComponent(name) === name
+  return !name.match(/[/@\s+%:]|^[_.]/) && encodeURIComponent(name) === name && name.length <= 214
 }
 
 export function isValidMultiName (name) {