@Prop not being transformed properly in @Watch

[jaredmcateer]

When a prop is being watched using a string identifier in the watch decorator the watch is not properly converting the argument to a property access of props.

      import { Component, Vue, Prop, Emit, Watch } from 'vue-property-decorator';
      @Component()
      export default class Foo {
        @Watch('b')
        handleBPropChange(newVal: number) {
          this.foo = \`\${newVal}\`;
          this.bar();
        });

        @Prop() b: number;
      }

      "import { ref } from \\"vue\\";
      const props = defineProps<{ "b": number; }>();
      const handleBPropChange = (newVal: number) => {
          foo.value = `${newVal}`;
          bar();
      };
      watch(b, handleBPropChange);
//          ^----- needs to be `props.b`