add gh-actions from highcharter

Change-Id: I5eaa87ea5148fbfccebb9898556e4693361f6c8e
diff --git a/.github/workflows/check-mac.yaml b/.github/workflows/check-mac.yaml
new file mode 100644
index 0000000..bc278fd
--- /dev/null
+++ b/.github/workflows/check-mac.yaml
@@ -0,0 +1,55 @@
+on: [push, pull_request]
+
+name: check-mac
+
+jobs:
+  R-CMD-check:
+    runs-on: ${{ matrix.config.os }}
+
+    name: ${{ matrix.config.os }} (${{ matrix.config.r }})
+
+    strategy:
+      fail-fast: false
+      matrix:
+        config:
+        - { os: macOS-latest, r: '3.6' }
+
+    env:
+      R_REMOTES_NO_ERRORS_FROM_WARNINGS: true
+      CRAN: ${{ matrix.config.cran }}
+
+    steps:
+      - uses: actions/checkout@v1
+
+      - uses: r-lib/actions/setup-r@master
+        with:
+          r-version: ${{ matrix.config.r }}
+
+      - uses: r-lib/actions/setup-pandoc@master
+
+      - uses: r-lib/actions/setup-tinytex@master
+        if: contains(matrix.config.args, 'no-manual') == false
+
+      - name: Install system dependencies
+        if: runner.os == 'macOS'
+        run: |
+          tlmgr install pdftexcmds
+
+      - name: Cache R packages
+        uses: actions/cache@v1
+        with:
+          path: ${{ env.R_LIBS_USER }}
+          key: ${{ runner.os }}-r-${{ matrix.config.r }}-${{ hashFiles('DESCRIPTION') }}
+
+      - name: Install dependencies
+        run: Rscript -e "install.packages('remotes')" -e "remotes::install_deps(dependencies = TRUE)" -e "remotes::install_cran('rcmdcheck')"  -e "install.packages('igraph')"
+
+      - name: Check
+        run: Rscript -e "rcmdcheck::rcmdcheck(args = '${{ matrix.config.args }}', error_on = 'warning', check_dir = 'check')"
+
+      - name: Upload check results
+        if: failure()
+        uses: actions/upload-artifact@master
+        with:
+          name: ${{ runner.os }}-r${{ matrix.config.r }}-results
+          path: check