Update azure-pipelines R options (#1427)

Author: erikcs

azure-pipelines.yml

@@ -69,8 +69,6 @@ jobs:
     value: 'https://cloud.r-project.org'
   - name: _R_CHECK_FORCE_SUGGESTS_
     value: false
-  - name: _R_CHECK_DONTTEST_EXAMPLES_
-    value: true
   - name: USE_BSPM
     value: true
   - name: WARNINGS_ARE_ERRORS
@@ -89,7 +87,7 @@ jobs:
   - script: |
       curl -OLs https://eddelbuettel.github.io/r-ci/run.sh && chmod 0755 run.sh
       ./run.sh bootstrap
-      ./run.sh install_deps
+      ./run.sh install_all
     workingDirectory: r-package/grf
     displayName: Setup R
   - script: ./run.sh run_tests