v0.1.3 Text extraction improvements, cleanup before release

What's Changed

• Clean up number of distinct exceptions by @PrinsFrank in #19
• Document thrown exceptions by @PrinsFrank in #20
• Upgrade to phpstan level 10 by @PrinsFrank in #21
• Add support for text string value bytes by @PrinsFrank in #25
• Cleanup getTypeNameValue from decoratedObjects by @PrinsFrank in #27
• Add public/internal annotations by @PrinsFrank in #28
• Add more Unit tests by @PrinsFrank in #29
• Simplify PHP version constraint by @PrinsFrank in #30
• Fix issues where string is already in correct encoding and is then converted again resulting in broken chars by @PrinsFrank in #31
• Properly handle all char mappings for BFChar and BFRange, including multibyte chars and multi single byte chars by @PrinsFrank in #32
• Fix missing characters when identical character matches in multiple cmaps but maps to NULL in one of them by @PrinsFrank in #33

Full Changelog: v0.1.2...v0.1.3