v1.0.0

[aosingh]

• Added support for Python 3.10. Dropped Python 3.6
• Optimized the function validate_expression()
• Support for special characters. Characters other than ? and * will be matched literally
• Added more unit test cases
• Simplified add_all() method
• Removed travis.yml and appveyor.yml
• Continous Integration using Github Action
• Simplified Readme