Use latest PHP 7.2.0RC5 as nightly removed no longer needed suppresion

Author: sergeyklay

.travis.yml

@@ -34,20 +34,12 @@ env:
 matrix:
     fast_finish: true
     allow_failures:
-        - php: nightly
         - php: 7.2
     exclude:
         - env: CC="gcc"
           compiler: clang
         - env: CC="clang"
           compiler: gcc
-    include:
-        - env: CC="gcc"
-          php: nightly
-          compiler: gcc
-        - env: CC="clang"
-          php: nightly
-          compiler: clang
 
 cache:
     apt: true

install-re2c

@@ -15,7 +15,7 @@ if [ "${CI}" != "true" ]; then
 fi
 
 if [ -z ${RE2C_VERSION+x} ]; then
-    echo "The RE2C_VERSION is unset. Stop."
+    echo "The RE2C_VERSION value is not set. Stop."
     exit 1
 fi