Release v0.1.0

• Support up-to-date dependencies(webview_flutter 4.4.2)

Release v0.0.3+2

• fix typo in README.md
• Support up-to-date dependencies(webview_flutter 3.0.0)

Release v0.0.3+1

• null safety
• dartdoc comments

Release v0.0.2

*initial release