stemangiola/tidyHeatmap: New layers

What's Changed Adding new symbols to layer_symbol by @mattgalbraith in https://github.com/stemangiola/tidyHeatmap/pull/106 update README and vignette by @stemangiola in https://github.com/stemangiola/tidyHeatmap/pull/109 update README and padding by @stemangiola in https://github.com/stemangiola/tidyHeatmap/pull/110 add text framework by @stemangiola in https://github.com/stemangiola/tidyHeatmap/pull/111 Dev by @stemangiola in https://github.com/stemangiola/tidyHeatmap/pull/112 New Contributors @mattgalbraith made their first contribution in https://github.com/stemangiola/tidyHeatmap/pull/106 Full Changelog: https://github.com/stemangiola/tidyHeatmap/compare/v1.9.0...v1.10.