Amended Travis build matrix

.travis.yml

@@ -1,19 +1,26 @@
 language: emacs-lisp
+
 env:
   - EMACS=emacs23
   - EMACS=emacs24
+  - EMACS=emacs25
+  - EMACS=emacs26
   - EMACS=emacs-snapshot
+  
 before_install:
   - sudo add-apt-repository -y ppa:cassou/emacs
   - sudo add-apt-repository -y ppa:ubuntu-elisp/ppa
   - sudo apt-get update -y -q
   - sudo apt-get install -y $EMACS-nox
+  
 install:
   - if [ "$EMACS" = "emacs23" ]; then
       curl -O 'https://raw.githubusercontent.com/ohler/ert/c619b56c5bc6a866e33787489545b87d79973205/lisp/emacs-lisp/ert.el';
     fi
+    
 script:
   - $EMACS -Q -batch --eval '(setq byte-compile-error-on-warn t)' -f batch-byte-compile rainbow-delimiters.el
   - $EMACS -Q -batch -l rainbow-delimiters-test.el -f ert-run-tests-batch-and-exit
+  
 notifications:
   email: false