types: bump TS version + type test for createComponent

packages/runtime-core/__tests__/createComponent.spec.ts

@@ -0,0 +1,36 @@
+import { createComponent } from '../src/component'
+import { value } from '@vue/observer'
+
+test('createComponent type inference', () => {
+  const MyComponent = createComponent({
+    props: {
+      a: Number,
+      b: {
+        type: String
+      }
+    },
+    setup(props) {
+      props.a * 2
+      props.b.slice()
+      return {
+        c: value(1),
+        d: {
+          e: value('hi')
+        }
+      }
+    },
+    render({ state, props }) {
+      state.c * 2
+      state.d.e.slice()
+      props.a * 2
+      props.b.slice()
+      this.a * 2
+      this.b.slice()
+      this.c * 2
+      this.d.e.slice()
+    }
+  })
+  MyComponent // avoid unused
+  // rename this file to .tsx to test TSX props inference
+  // ;(<MyComponent a={1} b="foo"/>)
+})