Branch name normalization

Included in this release:

• Branch names are now also normalized.
• Version and tag now implement Stringable.
• Added dependency to symfony/polyfill-php80 in preparation for PHP8 conversion.
• PHPStan clean up to level 9.

Parser improvements

Included in this release:

• Allowed more separator characters for the tag number (#2)
• Improved the branch and tag detection.
• More flexible and lenient parsing.
• Added the VersionTag class to hold tag and branch information.
• Added getTagInfo() to retrieve the VersionTag object.
• Added isStable(), isDev() and isPatch().
• The stable tag type is now recognized as well if present.
• Added short tag name parameter to registerTagType().
• Spaces are now supported as separator characters.
• More special characters are now filtered out.
• Added toArray(), mostly for debug reasons.
• Split the parser into several specialized subclasses.
• Deprecated setUppercase() - use setTagUppercase() instead.
• Deprecated getTagWeights() - use the TagWeights class instead.

PHP 7.4 update

Included in this release:

• Increased minimum requirement to PHP 7.4.
• Added the possibility to register custom tag types.
• Added setSeparatorChar() to change the separator character.
• Added setUppercase() to convert version tags to uppercase.
• Added support for the snapshot version tag type.
• Added isSnapshot().
• Using strict types in all classes.
• Set up PHPStan analysis, clean up to level 9.

Minor improvements

Included in this release:

• Improved build number generation.
• Added comparison methods isHigherThan(), isLowerThan().
• Added the changelog.md file.

Initial featureset release.

1.0.0

Initial commit