add sessionInfo for dev, add R 3.4

Author: eddelbuettel

.travis.yml

@@ -11,6 +11,8 @@ jobs:
   include:
     - name: release
       env: DOCKER_CNTR="rcpp/ci" R="R" COVR="yes"
+    - name: r-3.4
+      env: DOCKER_CNTR="rcpp/ci-3.4" R="R"
     - name: r-3.5
       env: DOCKER_CNTR="rcpp/ci-3.5" R="R"
     - name: dev
@@ -25,6 +27,7 @@ env:
 before_install:
   - docker pull ${DOCKER_CNTR}
   - docker run ${DOCKER_OPTS} ${DOCKER_CNTR} r -p -e 'sessionInfo()'
+  - if [[ "$R" == "RD" ]]; then docker run ${DOCKER_OPTS} ${DOCKER_CNTR} RDscript -e 'sessionInfo()'; fi
 
 install:
   - docker run ${DOCKER_OPTS} ${DOCKER_CNTR} ${R} CMD build ${R_BLD_OPTS} .

inst/NEWS.Rd

@@ -16,6 +16,11 @@
       \item Missing \code{Rcpp_list{2,3,4,5}} definition were added to
       the Rcpp namespace (Dirk fixing \ghit{1053}).
     }
+    \item Changes in Rcpp Deployment:
+    \itemize{
+      \item Travis CI unit tests now run a matrix over the versions of R
+      also tested at CRAN (rel/dev/oldrel/oldoldrel) (Dirk in \ghpr{1056}).
+    }
   }
 }