Update GitHub Actions workflow for R CMD check

.github/workflows/R-CMD-check.yml

@@ -6,22 +6,37 @@ jobs:
   R-CMD-check:
     runs-on: ubuntu-latest
 
+    strategy:
+      matrix:
+        config:
+          - { r: '4.0.5' }
+          - { r: '4.1.0' }
+
     steps:
     - name: Checkout repository
       uses: actions/checkout@v2
 
     - name: Set up R
       uses: r-lib/actions/setup-r@v2
+      with:
+        r-version: ${{ matrix.config.r }}
 
     - name: Install system dependencies
       run: |
-        sudo apt-get install -y libxml2-dev
-        sudo apt-get install -y libssl-dev
-        sudo apt-get install -y libcurl4-openssl-dev
+        sudo apt-get update
+        sudo apt-get install -y libxml2-dev libssl-dev libcurl4-openssl-dev libfontconfig1-dev libharfbuzz-dev libfribidi-dev
+
+    - name: Cache R packages
+      uses: actions/cache@v2
+      with:
+        path: ~/.R/Library
+        key: ${{ runner.os }}-R-${{ matrix.config.r }}-${{ hashFiles('DESCRIPTION') }}
+        restore-keys: |
+          ${{ runner.os }}-R-${{ matrix.config.r }}-
 
     - name: Install R package dependencies
       run: |
-        install.packages('devtools')
+        install.packages(c('devtools', 'textshaping', 'ragg', 'pkgdown'), dependencies = TRUE)
         devtools::install_deps(dependencies = TRUE)
       shell: Rscript {0}