testing with new IdnaConverter seems to require php-7.1

Signed-off-by: Michael Kaufmann <d00p@froxlor.org>

.travis.yml

@@ -3,8 +3,8 @@ language: php
 php:
 #  - "5.4"
 #  - "5.6"
-  - "7.0"
-#  - "7.1"
+#  - "7.0"
+  - "7.1"
 #  - "7.2"
 
 branches:
@@ -18,7 +18,7 @@ matrix:
  #     env: deps=highest
  #   - php: 5.4
  #     env: deps=lowest
-    - php: 7.0
+    - php: 7.1
       env: deps=highest
 
 mysql:

composer.json

@@ -57,7 +57,7 @@
 		"phploc/phploc": "3.0.1",
 		"theseer/phpdox": "0.11.2",
 		"phpunit/php-invoker": "1.1.4",
-		"php": ">=7.0",
+		"php": ">=7.1",
 		"ext-pcntl": "*",
 		"phpcompatibility/php-compatibility": "*"
 	},