isJSONObject 
Checks if a value is a JSON object.
A valid JSON object is defined as an object with string keys and valid JSON values.
Signature 
typescript
function isJSONObject(obj: unknown): obj is Record<string, any>;Parameters 
- value(- unknown): The value to check.
Returns 
(obj is Record<string, any>): True if the value is a JSON object, otherwise false.
Examples 
typescript
console.log(isJSONObject({ nested: { boolean: true, array: [1, 2, 3], string: 'test', number: 1, null: null } })); // true
console.log(isJSONObject({})); // true
console.log(isJSONObject({ regexp: /test/ })); // false
console.log(isJSONObject(123)); // false
