Update to allow usage of zend-expressive-helpers 4.0

Consumed API is identical, so we can allow that version as well.

Adds additional Travis jobs to test against helpers 2.2 and 3.0.1 on
each PHP version.

.travis.yml

@@ -23,6 +23,14 @@ matrix:
       env:
         - DEPS=locked
         - TEST_COVERAGE=true
+    - php: 5.6
+      env:
+        - DEPS=locked
+        - HELPER_DEPS="zendframework/zend-expressive-helpers:^2.2"
+    - php: 5.6
+      env:
+        - DEPS=locked
+        - HELPER_DEPS="zendframework/zend-expressive-helpers:^3.0.1"
     - php: 5.6
       env:
         - DEPS=latest
@@ -33,6 +41,14 @@ matrix:
       env:
         - DEPS=locked
         - CS_CHECK=true
+    - php: 7
+      env:
+        - DEPS=locked
+        - HELPER_DEPS="zendframework/zend-expressive-helpers:^2.2"
+    - php: 7
+      env:
+        - DEPS=locked
+        - HELPER_DEPS="zendframework/zend-expressive-helpers:^3.0.1"
     - php: 7
       env:
         - DEPS=latest
@@ -42,6 +58,14 @@ matrix:
     - php: 7.1
       env:
         - DEPS=locked
+    - php: 7.1
+      env:
+        - DEPS=locked
+        - HELPER_DEPS="zendframework/zend-expressive-helpers:^2.2"
+    - php: 7.1
+      env:
+        - DEPS=locked
+        - HELPER_DEPS="zendframework/zend-expressive-helpers:^3.0.1"
     - php: 7.1
       env:
         - DEPS=latest
@@ -51,6 +75,14 @@ matrix:
     - php: hhvm
       env:
         - DEPS=locked
+    - php: hhvm
+      env:
+        - DEPS=locked
+        - HELPER_DEPS="zendframework/zend-expressive-helpers:^2.2"
+    - php: hhvm
+      env:
+        - DEPS=locked
+        - HELPER_DEPS="zendframework/zend-expressive-helpers:^3.0.1"
     - php: hhvm
       env:
         - DEPS=latest
@@ -66,6 +98,7 @@ install:
   - if [[ $TRAVIS_PHP_VERSION =~ ^5.6 ]]; then travis_retry composer update $COMPOSER_ARGS --with-dependencies $LEGACY_DEPS ; fi
   - if [[ $DEPS == 'latest' ]]; then travis_retry composer update $COMPOSER_ARGS ; fi
   - if [[ $DEPS == 'lowest' ]]; then travis_retry composer update --prefer-lowest --prefer-stable $COMPOSER_ARGS ; fi
+  - if [[ $HELPER_DEPS != '' ]]; then travis_retry composer require $COMPOSER_ARGS --update-with-dependencies $HELPER_DEPS ; fi
   - if [[ $TEST_COVERAGE == 'true' ]]; then travis_retry composer require --dev $COMPOSER_ARGS $COVERAGE_DEPS ; fi
   - composer show
 

composer.json

@@ -21,7 +21,7 @@
         "php": "^5.6 || ^7.0",
         "container-interop/container-interop": "^1.2",
         "twig/twig": "^1.32 || ^2.1",
-        "zendframework/zend-expressive-helpers": "^1.4 || ^2.2 || ^3.0.1",
+        "zendframework/zend-expressive-helpers": "^1.4 || ^2.2 || ^3.0.1 || ^4.0",
         "zendframework/zend-expressive-router": "^1.3.2 || ^2.1",
         "zendframework/zend-expressive-template": "^1.0.4"
     },