refactor: adjust some typescript types for compatibility with future typescript versions

Author: MrWolfZ

src/update-function/set-user-defined-property.ts

@@ -20,5 +20,5 @@ export function setUserDefinedProperty<TValue>(nameOrState: string | FormState<T
     return formStateReducer(nameOrState, new SetUserDefinedPropertyAction(nameOrState.id, valueOrName, value));
   }
 
-  return (s: AbstractControlState<TValue>) => setUserDefinedProperty(ensureState(s), nameOrState, valueOrName);
+  return (s: AbstractControlState<TValue>) => setUserDefinedProperty(ensureState(s), nameOrState as string, valueOrName);
 }

src/update-function/validate.ts

@@ -57,7 +57,8 @@ export function validate<TValue>(
     return formStateReducer<TValue>(stateOrFunctionOrFunctionArray, new SetErrorsAction(stateOrFunctionOrFunctionArray.id, errors));
   }
 
-  let updateFnArr = Array.isArray(stateOrFunctionOrFunctionArray) ? stateOrFunctionOrFunctionArray : [stateOrFunctionOrFunctionArray];
+  const functionOrFunctionArray = stateOrFunctionOrFunctionArray as ValidationFn<TValue> | ValidationFn<TValue>[]
+  let updateFnArr = Array.isArray(functionOrFunctionArray) ? functionOrFunctionArray : [functionOrFunctionArray];
   updateFnArr = functionOrFunctionArr === undefined ? updateFnArr : updateFnArr.concat(functionOrFunctionArr);
   return (s: AbstractControlState<TValue>) => validate<TValue>(ensureState(s), updateFnArr.concat(rest));
 }