Adjust the Travis CI matrix: PHP 7.0 and 7.1, fewer revisions of libmemcached

.travis.yml

@@ -1,35 +1,34 @@
+sudo: required
+dist: trusty
+
 language: php
 php:
     - 7.0
+    - 7.1
+
+matrix:
+    fast_finish: true
+    allow_failures:
+        - php: 7.1
 
 env:
-    - LIBMEMCACHED_VERSION=1.0.18
-    - LIBMEMCACHED_VERSION=1.0.17
-    - LIBMEMCACHED_VERSION=1.0.16
-    - LIBMEMCACHED_VERSION=1.0.15
-    - LIBMEMCACHED_VERSION=1.0.14
-    - LIBMEMCACHED_VERSION=1.0.10
-    - LIBMEMCACHED_VERSION=1.0.8
-    - LIBMEMCACHED_VERSION=1.0.7
-    - LIBMEMCACHED_VERSION=1.0.6
-    - LIBMEMCACHED_VERSION=1.0.2
-    #- LIBMEMCACHED_VERSION=0.53
-    #- LIBMEMCACHED_VERSION=0.49
-    #- LIBMEMCACHED_VERSION=0.44
+    - LIBMEMCACHED_VERSION=1.0.18 # Debian Jessie / Ubuntu Xenial
+    - LIBMEMCACHED_VERSION=1.0.16 # RHEL / CentOS 7
+    - LIBMEMCACHED_VERSION=1.0.8  # Debian Wheezy / Ubuntu Trusty
+
 addons:
     apt:
         packages:
             - sasl2-bin
             - libsasl2-dev
+            - libevent-dev
 
 before_script:
     - ./.travis/travis.sh before_script $LIBMEMCACHED_VERSION
 
 script:
     - ./.travis/travis.sh script $LIBMEMCACHED_VERSION
 
-sudo: false
-
 cache:
     directories: 
     - $HOME/cache

.travis/travis.sh

@@ -79,7 +79,6 @@ function install_igbinary() {
 function install_msgpack() {
     git clone https://github.com/msgpack/msgpack-php.git
     pushd msgpack-php
-        git checkout master
         phpize
         ./configure
         make
@@ -238,7 +237,7 @@ case $ACTION in
         # Install igbinary extension
         install_igbinary
 
-        # install msgpack
+        # Install msgpack extension
         install_msgpack
 
         install_memcached