Version 2.0.0

• #85 Update to ANTLR 4.9 (@chisholm)
• #88 Default to STIX 2.1 version patterns

Version 1.3.2

#79 Fix bug to prevent crashing on '*' selector in hashes (@chisholm)
#81 Fix bug with bracket checking to allow for nested parentheses (@chisholm)

Version 1.3.1

• #75 Fix bug with SSDEEP hashes in STIX 2.1 (@emmanvg)

Version 1.3.0

• #68 Update to ANTLR 4.8 (@chisholm)
• #69 Add "visit()" methods to Pattern classes (@chisholm)
• #71 Fix bug with multiple qualifiers in a pattern (@chisholm)

Version 1.2.1

• Fix some imports for backwards compatibility

Version 1.2.0

• #59 Fixed bug where malformed hashes would pass (@JohannKT)
• #63, #64 Fixed bugs with leading and trailing whitespace (@squioc)
• Support STIX 2.1 patterns
• Add testing for Python 3.8

Version 1.1.0

• Add a visitor to the ANTLR parser
• Add testing for Python 3.7

Version 1.0.0

• #34 - Add documentation on ReadTheDocs: https://stix2-patterns.readthedocs.io/
• #39 - Raise error for unexepected unused character values.
• #41 - Raise error for negative REPEAT values.
• #42 - Improved Timestamp validation.
• #43 - Validate Base64 binary literals.
• #48 - Make pattern qualifier and operator keywords case-sensitive.
• Drop support for Python 2.6 and 3.3.

v0.6.0

• #32 - Added a public walk() method to the Pattern class. (@chisholm)
• Make repository structure match other projects. (@emmanvg)

v0.5.0

• Separate object and path components in inspector.
• Support "NOT" qualifier on all comparison operators.