Clean up dependencies

Clean up dependencies

Dev 3.0.3 (#7)

Upgrade dependencies.

Merge remote-tracking branch 'origin/main'

Improve pie chart demo, add a "Save" button for PNG export in the Android median demo, update dependencies - Lets-Plot to v4.8.1, Lets-Plot Kotlin to v4.12.0, Lets-Plot Compose to v3.0.1,

Upgrade dependencies.

Minor update in README.md

Update demos to LP-Compose v3.0.0 (#6)

Update .gitignore

Update letsPlot and letsPlotKotlin versions; adjust pie chart size and simplify layout in demo app

Revert "Android: update Lets-Plot version, switch from Skia to Lets-Plot rasterizer and native Android canvas"

Android: update Lets-Plot version, switch from Skia to Lets-Plot rasterizer and native Android canvas

Add ggtb() demo

Merge remote-tracking branch 'origin/main'