Fix bin not exist when installed via yarn

[CYBAI]

yarn will link bin files in package.json.

This should fix #205 and #193.

Besides, due to yarn cached installed packages, if you have installed vue-cli before, please remove them from .yarn-cache and re-install it again.

[posva]

@CYBAI Thanks!
About the last comment, wouldn't release a new version be enough?

[CYBAI]

@posva
oh! If releasing a new version, I think users will no need to do what I mentioned in last comment. 😄

[CYBAI]

Here is how I test locally

yarn install with original version (I've already installed vue-cli with yarn before, so it just installed only 1.54s)

→ yarn global add file:/path/to/vue-cli
yarn global v0.16.1
warning No license field
[1/4] 🔍  Resolving packages...
[2/4] 🚚  Fetching packages...
[3/4] 🔗  Linking dependencies...
[4/4] 📃  Building fresh packages...
success Installed vue-cli@2.4.0 with binaries:
      - vue
✨  Done in 1.54s.

then update package.json for version and bin, it will install vue-init and vue-list successfully.

→ yarn global add file:/path/to/vue-cli
yarn global v0.16.1
warning No license field
[1/4] 🔍  Resolving packages...
[2/4] 🚚  Fetching packages...
[3/4] 🔗  Linking dependencies...
[4/4] 📃  Building fresh packages...
success Installed vue-cli@2.4.999 with binaries:
      - vue
      - vue-init
      - vue-list
✨  Done in 24.01s.

[posva]

@CYBAI Works well! Thanks for the tips btw!

[zigomir]

@CYBAI thanks for this! I tested it and it works. Please bump version to 2.4.1 because without this change (as you mentioned) fix won't work (at least it hasn't for me). I know we'd bump version anyway, but since it's a requirement for this particular fix, I'd include it here.