DPI-2832 Pack plotly in nix

Author: brucetan-displayr

package.nix

@@ -0,0 +1,10 @@
+{ pkgs ? import <nixpkgs> {}, displayrUtils }:
+
+pkgs.rPackages.buildRPackage {
+  name = "plotly";
+  version = displayrUtils.extractRVersion (builtins.readFile ./DESCRIPTION); 
+  src = ./.;
+  description = "Create interactive web graphics from 'ggplot2' graphs and/or a custom interface to the (MIT-licensed) JavaScript library 'plotly.js' inspired by the grammar of graphics.";
+  propagatedBuildInputs = with pkgs.rPackages; [ tools scales httr jsonlite magrittr digest viridisLite base64enc htmltools htmlwidgets tidyr RColorBrewer dplyr vctrs tibble lazyeval rlang crosstalk purrr data_table promises ];
+
+}