call 0.3.0

Calling dynamic link library(native function) in the way of defining static resources. You can use the package to open the dylib defined in the `assets` field of `pubsepc.yaml`.

0.3.0 Null Safety.

• Rewrite the doc on pub.dev

0.2.3 Repair the doc.

• Repair the url path of GitHub README.md file.

0.2.2 Repair the travis-ci file.

0.2.1 Repair the doc.

• Add travis-ci supported.

0.2.0 Change internal API.

• From interface to abstract class.
• Add [getDyLibModule] code docs to read API easily.

0.1.0 Change internal API.

• Support MacOS Release Mode.

0.0.3 Support Linux.

Linux test.

0.0.2 README.

Add docs content.

0.0.1 TODO: Add release date.

• TODO: Describe initial release.