adding packages to resources

Author: libjohn

resources.Rmd

@@ -8,6 +8,8 @@ output:
 - [R We having Fun Yet‽](https://rfun.library.duke.edu/#portfolio): aka "**Rfun**".  Free face-to-face, hands-on learning lab series for the Duke University Community.  **Recordings, code and  materials** are shareable under a [CC BY-NC license](https://creativecommons.org/licenses/by-nc/4.0/).
 - [simple features](https://r-spatial.github.io/sf/) package
 - [mapview](https://r-spatial.github.io/mapview/) - package
+- [tidycensus](https://walkerke.github.io/tidycensus/)
+- [tigiris](https://github.com/walkerke/tigris) _get shapefiles_
 - [Geocomputation with R](https://geocompr.robinlovelace.net/) by Lovelace, Nowosad, and Muenchow
 - [Spatial Data Science](https://keen-swartz-3146c4.netlify.com/) - by Pebesma and Bivand
 - [Interactive Primers](https://rstudio.cloud/learn/primers):  Free interactive mini-labs for learning R/Tidyverse