Fixes for empty entries

What's Changed

• Support APK built with AGP version 8.3 by @mathroule in #28

Full Changelog: 0.7.4...0.7.5

Update rubyzip dependency

• Integrated dependency update from #25 to v1.3.0

Read Encoding Fixes

• Integrated proposed fixes for Issue #12 causing read errors on Ruby 2.2.x

More Resource Types

• Added support for float, fraction, and reference resource types in the parser.
• Bug fixes for Issues #11, #13
• Merged bug fix submission for Issue #5 (thanks @idstein)

Multi-Package Support

Add support for APKs with multiple resource packages defined.