Use matrix build. Prep for release.

.travis.yml

@@ -12,5 +12,14 @@ addons:
       - libmagick++-dev
       - cargo
 
-after_success:
-  - Rscript -e 'covr::codecov(line_exclusions = list("R/load.R" = c(32:33, 39:40, 46:47, 53:54)))'
+matrix:
+  include:
+   - r: release
+     after_success:
+       - Rscript -e 'covr::codecov(line_exclusions = list("R/load.R" = c(32:33, 39:40, 46:47, 53:54)))'
+   - r: devel
+     r_build_args: --no-build-vignettes
+     r_check_args: --ignore-vignettes --no-examples
+   - r: oldrel
+     r_build_args: --no-build-vignettes
+     r_check_args: --ignore-vignettes --no-examples

codemeta.json

@@ -183,7 +183,7 @@
   ],
   "releaseNotes": "https://github.com/leonawicz/imgpalr/blob/master/NEWS.md",
   "readme": "https://github.com/leonawicz/imgpalr/blob/master/README.md",
-  "fileSize": "1125.03KB",
+  "fileSize": "1125.031KB",
   "contIntegration": [
     "https://travis-ci.org/leonawicz/imgpalr",
     "https://ci.appveyor.com/project/leonawicz/imgpalr",

cran-comments.md

@@ -1,6 +1,8 @@
 ## Test environments
+
 * local Windows 10 install, R 3.6.1
-* ubuntu 14.04 (on travis-ci), R 3.6.1
+* Windows 10 (AppVeyor), R 3.6.1
+* Ubuntu 16.04 (Travis CI), R-devel, R-release (3.6.1), R-oldrel (3.5.3)
 * win-builder (devel and release)
 
 ## R CMD check results
@@ -9,8 +11,6 @@
 
 * This is an update release.
 
-* Minor updates to example and unit tests.
-
 I have also run R CMD check on downstream dependencies 
 (https://github.com/leonawicz/imgpalr/blob/master/revdep/). 
 All packages passed.