Erro ao consultar a versão do Vue.

Instalando Vue CLI

PS C:\Users\Ryan Costa> npm install -g vue-cli@2.7.0
npm WARN deprecated request@2.88.2: request has been deprecated, see https://github.com/request/request/issues/3142
npm WARN deprecated gulp-util@3.0.8: gulp-util is deprecated - replace it, following the guidelines at https://medium.com/gulpjs/gulp-util-ca3b1f9f9ac5 
npm WARN deprecated coffee-script@1.12.7: CoffeeScript on NPM has moved to "coffeescript" (no hyphen)
npm WARN deprecated har-validator@5.1.5: this library is no longer supported
C:\Users\Ryan Costa\AppData\Roaming\npm\vue -> C:\Users\Ryan Costa\AppData\Roaming\npm\node_modules\vue-cli\bin\vue
C:\Users\Ryan Costa\AppData\Roaming\npm\vue-init -> C:\Users\Ryan Costa\AppData\Roaming\npm\node_modules\vue-cli\bin\vue-init
C:\Users\Ryan Costa\AppData\Roaming\npm\vue-list -> C:\Users\Ryan Costa\AppData\Roaming\npm\node_modules\vue-cli\bin\vue-list
npm WARN notsup Unsupported engine for got@5.7.1: wanted: {"node":">=0.10.0 <7"} (current: {"node":"14.15.1","npm":"6.14.8"})
npm WARN notsup Not compatible with your version of node/npm: got@5.7.1

+ vue-cli@2.7.0
updated 2 packages in 23.489s

Consultando versão do Vue

PS C:\Users\Ryan Costa> vue --version
vue : O arquivo C:\Users\Ryan Costa\AppData\Roaming\npm\vue.ps1 não pode ser carregado. O arquivo C:\Users\Ryan Costa\AppData\Roaming\npm\vue.ps1 não 
está assinado digitalmente. Não é possível executar este script no sistema atual. Para obter mais informações sobre como executar scripts e definir a   
política de execução, consulte about_Execution_Policies at https://go.microsoft.com/fwlink/?LinkID=135170.
No linha:1 caractere:1
+ vue --version
+ ~~~
    + CategoryInfo          : ErrodeSegurança: (:) [], PSSecurityException
    + FullyQualifiedErrorId : UnauthorizedAccess