use ppa:stesie/libv8, build against V8 7.1

.travis.yml

@@ -5,11 +5,11 @@ services:
   - docker
 
 env:
-  - V8VER=6.6
+  - V8VER=7.1
     PHPVER=7.0
-  - V8VER=6.6
+  - V8VER=7.1
     PHPVER=7.1
-  - V8VER=6.6
+  - V8VER=7.1
     PHPVER=7.2
 
 script: make -f Makefile.travis test

Dockerfile.travis

@@ -9,7 +9,7 @@ RUN apt-get update -q
 RUN apt-get install -y software-properties-common
 
 RUN add-apt-repository ppa:ondrej/php
-RUN add-apt-repository ppa:pinepain/php -y
+RUN add-apt-repository ppa:stesie/libv8 -y
 RUN apt-get update -q
 
 RUN apt-get install -y php$PHPVER-dev libv8-$V8VER-dev

Makefile.travis

@@ -1,5 +1,5 @@
 # Configure and build scripts for travis CI system
-V8VER ?= 6.6
+V8VER ?= 7.1
 
 IMAGENAME ?= v8js-test