update R version for Travis and prefer binary packages (#320)

Author: StrikerRUS

R-package/.R.appveyor.ps1

@@ -36,6 +36,8 @@ conda install -y --no-deps pandoc
 cd .\R-package
 Add-Content .Renviron "R_LIBS=$env:R_LIB_PATH"
 Add-Content .Rprofile "options(repos = 'https://cran.rstudio.com')"
+Add-Content .Rprofile "options(pkgType = 'binary')"
+Add-Content .Rprofile "options(install.packages.check.source = 'no')"
 Add-Content .Rprofile "Sys.setenv(RETICULATE_PYTHON = '$([RegEx]::Escape($env:CONDA_PREFIX))/python.exe')"
 
 Rscript -e "if(!'devtools' %in% rownames(installed.packages())) { install.packages('devtools', dependencies = TRUE) }"

R-package/.R.travis.sh

@@ -2,6 +2,8 @@ mkdir -p $R_LIB_PATH
 cd $TRAVIS_BUILD_DIR/R-package
 echo "R_LIBS=$R_LIB_PATH" > .Renviron
 echo 'options(repos = "https://cran.rstudio.com")' > .Rprofile
+echo 'options(pkgType = "binary")' >> .Rprofile
+echo 'options(install.packages.check.source = "no")' >> .Rprofile
 
 export PATH="$R_LIB_PATH/R/bin:$PATH"
 
@@ -12,7 +14,7 @@ if [[ $TRAVIS_OS_NAME == "linux" ]]; then
     sudo apt-get install texlive-latex-recommended texlive-fonts-recommended texlive-fonts-extra qpdf
 
     if ! command -v R &> /dev/null; then
-        R_VER=3.6.1
+        R_VER=3.6.2
         cd $TRAVIS_BUILD_DIR
         wget https://cran.r-project.org/src/base/R-3/R-$R_VER.tar.gz
         tar -xzf R-$R_VER.tar.gz