fix(RxapFormBuild): throw if form definition can not be injected.

# Changelog

## [0.2.1]

### Fixed

- (RxapFormBuild): throw if form definition can not be injected.

## [0.2.0]

### Added

- (RxapFormBuild): add support for injectable validators

{

  "name": "@rxap/forms",

  "version": "0.2.0",

  "version": "0.2.1",

  "private": false,

  "author": "Merzough Münker",

  "homepage": "https://gitlab.com/rxap/packages",

import {

  Injector,

  StaticProvider

  StaticProvider,

  isDevMode

} from '@angular/core';

import {

  Constructor,

      providers: this.providers

    });

    const form = injector.get(this.definition, new this.definition());

    let form: Form & Record<string, Function>;

    // don't use the notFoundValue feature of the injector.

    // if used for each call of the get method an "empty" or "fallback"

    // instance is created

    try {

      form = injector.get(this.definition);

    } catch (e) {

      if (isDevMode()) {

        console.warn('Could not inject the definition instance. Fallback and call the constructor of the definition class.');

      }

      form = (new this.definition()) as Form & Record<string, Function>;

    }

    const controls: Record<string, AbstractControl> = {};