travis-ci: fixed the IPC::Run dep for Test::Nginx and also added nginx 1.13.5 to the matrix.

Author: agentzh

.travis.yml

@@ -50,6 +50,7 @@ env:
     - TEST_NGINX_SLEEP=0.006
   matrix:
     - NGINX_VERSION=1.11.2
+    - NGINX_VERSION=1.13.5
 
 services:
  - memcache
@@ -59,6 +60,7 @@ services:
 before_install:
   - '! grep -n -P ''(?<=.{80}).+'' --color `find src -name ''*.c''` `find . -name ''*.h''` || (echo "ERROR: Found C source lines exceeding 80 columns." > /dev/stderr; exit 1)'
   - '! grep -n -P ''\t+'' --color `find src -name ''*.c''` `find . -name ''*.h''` || (echo "ERROR: Cannot use tabs." > /dev/stderr; exit 1)'
+  - sudo cpanm --notest Test::Nginx IPC::Run > build.log 2>&1 || (cat build.log && exit 1)
 
 install:
   - if [ ! -f download-cache/drizzle7-$DRIZZLE_VER.tar.gz ]; then wget -P download-cache http://openresty.org/download/drizzle7-$DRIZZLE_VER.tar.gz; fi