using it in another project

[KnowsCount]

to add vue-lib component library I ran

npm install --save @knowscount/vue-lib

and then placed <InputBox /> & import InputBox from '@knowscount/vue-lib, registering the component, yet the page went blank and the folioing error was reported in the console:

[Vue warn]: Error in render: "TypeError: Vue.component is not a function"

found in

---> <App> at src/App.vue
       <Root>
warn @ vue.runtime.esm.js?2b0e:619

and also

vue.runtime.esm.js?2b0e:1888 TypeError: Vue.component is not a function
    at eval (vue-lib.esm.js?ca34:5655)
    at Array.forEach (<anonymous>)
    at installVueLib (vue-lib.esm.js?ca34:5654)
    at resolveAsyncComponent (vue.runtime.esm.js?2b0e:3686)
    at createComponent (vue.runtime.esm.js?2b0e:3200)
    at _createElement (vue.runtime.esm.js?2b0e:3422)
    at createElement (vue.runtime.esm.js?2b0e:3353)
    at vm._c (vue.runtime.esm.js?2b0e:3491)
    at Proxy.render (App.vue?6ad7:13)
    at VueComponent.Vue._render (vue.runtime.esm.js?2b0e:3548)
logError @ vue.runtime.esm.js?2b0e:1888

[KnowsCount]

resolved in team-innovation/vue-sfc-rollup#89.

[KnowsCount]

Quoting @mgdodge:

If you are writing a library of components, however, you must choose to import the entire library, or use a slightly different syntax to import individual components:

// Import and register entire library
import MyLibrary from '@knowscount/my-library';
Vue.use(MyLibrary);

// Import and register globally individual components from the library
import { MyComponent, MyComponent2 } from '@knowscount/my-library';
Vue.component('MyComponent', MyComponent);
Vue.component('MyComponent2', MyComponent2);

// Import and register locally individual components from the library
import { MyComponent, MyComponent2 } from '@knowscount/my-library';

export default {
  name: 'SomeParentComponent',
  components: {
    MyComponent,
    MyComponent2,
  }
  ...
}

The sample you provided is a library which currently contains a single component. I tested it, and everything works if you follow any of the library example listed.