Drop support for PHP < 7.1

Author: alcaeus

.travis.yml

@@ -26,20 +26,12 @@ after_script:
     - php ./vendor/bin/coveralls -v
 
 matrix:
-    exclude:
-        - php: 5.3
-          dist: trusty
     allow_failures:
         - php: nightly
     include:
-        - php: 5.3
-          dist: precise
-        - php: 5.4
-        - php: 5.5
-        - php: 5.6
-          env: DEPS="dev"
-        - php: 7.0
         - php: 7.1
+        - php: 7.1
+          env: DEPS="dev"
         - php: 7.2
         - php: 7.3
         - php: nightly

composer.json

@@ -32,9 +32,9 @@
         }
     ],
     "require": {
-        "php":                     ">=5.3.2",
-        "symfony/doctrine-bridge": "~2.7|~3.3|~4.0",
-        "doctrine/inflector":      "~1.0",
+        "php":                     "^7.1",
+        "symfony/doctrine-bridge": "^4.0",
+        "doctrine/inflector":      "^1.0",
         "doctrine/cache":          "^1.4.2"
     },
     "require-dev": {