updated R here as well

datascience-notebook/Dockerfile

@@ -45,8 +45,8 @@ USER $NB_UID
 
 # R packages including IRKernel which gets installed globally.
 RUN conda install --quiet --yes \
-    'r-base=3.6.3' \
-    'r-caret=6.0*' \
+    'r-base=4.0.0' \
+    'r-caret=6.*' \
     'r-crayon=1.3*' \
     'r-devtools=2.3*' \
     'r-forecast=8.12*' \
@@ -55,20 +55,23 @@ RUN conda install --quiet --yes \
     'r-htmlwidgets=1.5*' \
     'r-irkernel=1.1*' \
     'r-nycflights13=1.0*' \
-    'r-plyr=1.8*' \
     'r-randomforest=4.6*' \
     'r-rcurl=1.98*' \
-    'r-reshape2=1.4*' \
-    'r-rmarkdown=2.1*' \
+    'r-rmarkdown=2.2*' \
+    'r-rodbc=1.3*' \
     'r-rsqlite=2.2*' \
     'r-shiny=1.4*' \
     'r-tidyverse=1.3*' \
-    'rpy2=3.1*' \
+    'unixodbc=2.3.*' \
+    'r-tidymodels=0.1*' \
     && \
     conda clean --all -f -y && \
     fix-permissions $CONDA_DIR && \
     fix-permissions /home/$NB_USER
 
+# Install e1071 R package (dependency of the caret R package)
+RUN conda install --quiet --yes r-e1071
+
 # Add Julia packages. Only add HDF5 if this is not a test-only build since
 # it takes roughly half the entire build time of all of the images on Travis
 # to add this one package and often causes Travis to timeout.