Drop support for PHP < 7.1

Author: alcaeus

.travis.yml

@@ -26,21 +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
-          env: COMPOSER_MEMORY_LIMIT=-1
-        - php: 5.4
-        - php: 5.5
-        - php: 5.6
-          env: DEPS="dev" COMPOSER_MEMORY_LIMIT=-1
-        - php: 7.0
         - php: 7.1
+        - php: 7.1
+          env: DEPS="dev"
         - php: 7.2
         - php: 7.3
         - php: nightly

composer.json

@@ -32,20 +32,20 @@
         }
     ],
     "require": {
-        "php":                     ">=5.3.2",
-        "symfony/doctrine-bridge": "~2.7|~3.3|~4.0",
-        "doctrine/inflector":      "~1.0",
+        "php":                     "^7.1",
+        "symfony/doctrine-bridge": "^3.4|^4.0",
+        "doctrine/inflector":      "^1.0",
         "doctrine/cache":          "^1.4.2"
     },
     "require-dev": {
-        "phpunit/phpunit":                       "~4.8.36|~5.6|~6.5|~7.0",
-        "symfony/phpunit-bridge":                "~2.7|~3.3|~4.0",
-        "symfony/yaml":                          "~2.7|~3.3|~4.0",
-        "symfony/validator":                     "~2.7|~3.3|~4.0",
-        "symfony/console":                       "~2.7|~3.3|~4.0",
-        "symfony/finder":                        "~2.7|~3.3|~4.0",
-        "symfony/framework-bundle":              "~2.7|~3.3|~4.0",
-        "symfony/security-acl":                  "~2.7|~3.3",
+        "phpunit/phpunit":                       "^7.0",
+        "symfony/phpunit-bridge":                "^3.4|^4.0",
+        "symfony/yaml":                          "^3.4|^4.0",
+        "symfony/validator":                     "^3.4|^4.0",
+        "symfony/console":                       "^3.4|^4.0",
+        "symfony/finder":                        "^3.4|^4.0",
+        "symfony/framework-bundle":              "^3.4|^4.0",
+        "symfony/security-acl":                  "^2.8",
         "instaclick/coding-standard":            "~1.1",
         "satooshi/php-coveralls":                "^1.0",
         "squizlabs/php_codesniffer":             "~1.5",