docs(component): document 'require' in angular.component

Closes #14429

Author: ademuri

src/ng/compile.js

@@ -1047,6 +1047,9 @@ function $CompileProvider($provide, $$sanitizeUriProvider) {
    *      See {@link ng.$compile#-bindtocontroller- `bindToController`}.
    *    - `transclude` – `{boolean=}` – whether {@link $compile#transclusion content transclusion} is enabled.
    *      Disabled by default.
+   *    - `require` - `{Object<string, string>=}` - requires the controllers of other directives and binds them to
+   *      this component's controller. The object keys specify the property names under which the required
+   *      controllers (object values) will be bound. See {@link ng.$compile#-require- `require`}.
    *    - `$...` – additional properties to attach to the directive factory function and the controller
    *      constructor function. (This is used by the component router to annotate)
    *