feat: add InjectModel decorator

src/decorator.spec.ts

@@ -0,0 +1,14 @@
+import { InjectModel } from './decorator'
+import Component from 'vue-class-component'
+import  Vue from 'vue'
+
+describe('InjectModel', () => {
+  @Component
+  class Test extends Vue {
+    @InjectModel test: any
+  }
+  it('maps correctly', () => {
+    const component = new Test()
+    expect(component.$options.injectModels).toStrictEqual(['test'])
+  })
+})

src/decorator.ts

@@ -0,0 +1,9 @@
+import { createDecorator } from 'vue-class-component'
+
+// tslint:disable-next-line
+export const InjectModel = createDecorator((options: any, key) => {
+  if (!options.injectModels) {
+    options.injectModels = []
+  }
+  options.injectModels.push(key)
+})

src/index.ts

@@ -6,6 +6,7 @@ import { Vue } from 'vue/types/vue'
 import Registry from './registry'
 import { ModelInstallOptions } from './types'
 
+export * from './decorator'
 export { Registry }
 
 interface InstallContext {