revert: underlying libraries need upgrade

Dockerfile

@@ -33,7 +33,7 @@ ENV LANG="en_US.UTF-8" LANGUAGE="en_US:en" LC_ALL="en_US.UTF-8"
 # Install necessary R dependencies for reconstructR that don't have apt packages
 RUN R -e "for (lib in c( 'LaplacesDemon', 'kmer', 'phylogram', 'aphid', 'insect' )) { install.packages(lib, dependencies=TRUE); library(lib, character.only=TRUE) }"
 # Rfast in CRAN is broken, install from github
-RUN R -e "devtools::install_github('RfastOfficial/Rfast', dependencies=TRUE, upgrade='never'); library(Rfast)"
+RUN R -e "devtools::install_github('RfastOfficial/Rfast', dependencies=TRUE); library(Rfast)"
 
 # Install reconstructR R package -- invalidate cache any time github main branch updates
 ADD https://api.github.com/repos/broadinstitute/reconstructR/git/refs/heads/main version.json