Web component name requires hyphen for one file even if wildcard is provided

[spaceemotion]

Version

4.0.5

Environment info

Environment Info:

  System:
    OS: macOS Mojave 10.14.2
    CPU: (12) x64 Intel(R) Core(TM) i7-8700K CPU @ 3.70GHz
  Binaries:
    Node: 10.15.3 - ~/.nvm/versions/node/v10.15.3/bin/node
    Yarn: 1.17.3 - ~/.yarn/bin/yarn
    npm: 6.13.1 - ~/.nvm/versions/node/v10.15.3/bin/npm
  Browsers:
    Chrome: 78.0.3904.97
    Firefox: 66.0.5
    Safari: 12.0.2
  npmPackages:
    @vue/babel-helper-vue-jsx-merge-props:  1.0.0
    @vue/babel-plugin-transform-vue-jsx:  1.1.2
    @vue/babel-preset-app:  4.0.5
    @vue/babel-preset-jsx:  1.1.2
    @vue/babel-sugar-functional-vue:  1.1.2
    @vue/babel-sugar-inject-h:  1.1.2
    @vue/babel-sugar-v-model:  1.1.2
    @vue/babel-sugar-v-on:  1.1.2
    @vue/cli-overlay:  4.0.5
    @vue/cli-plugin-babel: ^4.0.0 => 4.0.5
    @vue/cli-plugin-eslint: ^4.0.0 => 4.0.5
    @vue/cli-plugin-router:  4.0.5
    @vue/cli-plugin-typescript: ^4.0.0 => 4.0.5
    @vue/cli-plugin-vuex:  4.0.5
    @vue/cli-service: ^4.0.0 => 4.0.5
    @vue/cli-shared-utils:  4.0.5
    @vue/component-compiler-utils:  3.0.2
    @vue/eslint-config-airbnb: ^4.0.0 => 4.0.1
    @vue/eslint-config-typescript: ^4.0.0 => 4.0.0
    @vue/preload-webpack-plugin:  1.1.1
    @vue/web-component-wrapper:  1.2.0
    eslint-plugin-vue: ^5.0.0 => 5.2.3
    typescript: ~3.5.3 => 3.5.3
    vue: ^2.6.10 => 2.6.10
    vue-eslint-parser:  5.0.0
    vue-hot-reload-api:  2.3.4
    vue-loader:  15.7.2
    vue-style-loader:  4.1.2
    vue-template-compiler: ^2.6.10 => 2.6.10
    vue-template-es2015-compiler:  1.9.1
  npmGlobalPackages:
    @vue/cli: 4.0.5

Steps to reproduce

1. Create vue project (vue create demo) with default template
2. Run vue-cli-service build --target wc-async --inline-vue --name foo 'src/components/*.vue'

What is expected?

It tags the HelloWorld component as "foo-hello-word"

What is actually happening?

Since there's just one item in the list, it requires a hypen in the "--name" option. As soon as there's another file, it works.