fix: typing issues in packages

### Description

- [ ] Certain modules have `any` typings which doesn't comply with strict mode.

### Steps to Reproduce

Use the packages in a `strict` mode `true` setup.

### Please select the area the issue is related to

@asgardeo/javascript, @asgardeo/react

### Version

current

### Environment Details (with versions)

N/A

### Reporter Checklist

- [x] I have searched the existing issues and this is not a duplicate.
- [x] I have provided all the necessary information.
- [x] I have tested the issue on the latest version of the package.