fix(core): fixed typing in core utilities

core/src/utilities.ts

@@ -1,11 +1,11 @@
 export function lockObject<T extends object>(input: T, exclusions: (keyof T)[]): T {
     return new Proxy(input, {
-        get(target, prop: keyof T) {
-            if (exclusions.includes(prop)) {
-                throw new Error(`Access to property '${prop}' is denied`);
+        get(target, prop) {
+            if (exclusions.includes(prop as keyof T)) {
+                throw new Error(`Access to property '${prop as string}' is denied`);
             }
 
-            const value = target[prop];
+            const value = target[prop as keyof T];
 
             if (typeof value === 'function') {
                 return (...args: any[]) => Reflect.apply(value, target, args);