fix: typings for UseVueFlow

Signed-off-by: bcakmakoglu <78412429+bcakmakoglu@users.noreply.github.com>

src/context/index.ts

@@ -1,5 +1,5 @@
 import { InjectionKey } from 'vue'
 import { UseVueFlow } from '~/types'
 
-export const VueFlow: InjectionKey<UseVueFlow> = Symbol('vueFlow')
-export const NodeId: InjectionKey<string> = Symbol('nodeId')
+export const VueFlow: InjectionKey<UseVueFlow> = Symbol('vueFlow') as InjectionKey<UseVueFlow>
+export const NodeId: InjectionKey<string> = Symbol('nodeId') as InjectionKey<string>