fix(dts): Fix build dts error (fix #520)

[0x-jerry]

Before this PR, build dts for CameraControls/MapControls/OrbitControls components will failed because of error TS7056, this should fix issue #520.

src/core/controls/OrbitControls.vue:797:1 - error TS7056: The inferred type of this node exceeds the maximum length the compiler will serialize. An explicit type annotation is needed.

797 export default (await import('vue')).defineComponent({
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
798 setup() {
    ~~~~~~~~~
... 
805 props: {} as __VLS_WithDefaults<__VLS_TypePropsToOption<__VLS_PublicProps>, typeof __VLS_withDefaultsArg>,
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
806 });

After this PR, the error TS7056 will disappear.

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