async_zip

Add functions to extract an archive into a directory

• Add functions to extract an archive into a directory.
• Rename classes to be more Dart idiomatic:
  • ZipFileReader becomes ZipFileReaderSync
  • ZipFileReaderAsync becomes ZipFileReader
  • ZipFileWriter becomes ZipFileWriterSync
  • ZipFileWriterAsync becomes ZipFileWriter

Instead of interpreting the zero timestamp value as 1979-11-30 00:00:00
the current timestamp used.

• Update C library to version 0.2.6.
• Change behavior of C library for Zip entries without a timestamp. Instead of interpreting the zero timestamp value as 1979-11-30 00:00:00 the current timestamp used.

Remove unnecessary imports and migrate to SDK and API 33

• Remove unnecessary imports in order to satisfy static analyzer.
• Update dependencies.
• Fix async example in README.md and use ZipFileWriterAsync instead of ZipFileWriter (thank you ioridev) .
• Migrate Android code to SDK and API 33.

This should increase the score of the package on pub.dev.

• Reformat source files with a line length of 80 characters and increase the length of the description in pubspec.yaml to increase the package score on pub.dev.

Fix static linking of C code not working on iOS

• Initial release with support for reading and writing Zip files synchronously and asynchronously.