Upgraded phpoption

Author: GrahamCampbell

composer.json

@@ -17,7 +17,7 @@
     ],
     "require": {
         "php": "^5.5.9 || ^7.0",
-        "phpoption/phpoption": "^1.6",
+        "phpoption/phpoption": "^1.7",
         "symfony/polyfill-ctype": "^1.9"
     },
     "require-dev": {

phpstan.neon.dist

@@ -8,3 +8,4 @@ parameters:
     - '/^Parameter \#2 \$writers of class Dotenv\\Repository\\[a-zA-Z]*Repository[a-zA-Z]* constructor expects/'
     - '#Method Dotenv\\Repository\\AbstractRepository::offset[a-zA-Z\(\)\$ ]* typehint specified.#'
     - '#Method Dotenv\\Loader\\Lines::getCharPairs\(\) should return array\(array\(string, string\|null\)\) but returns array\<int, mixed\>.#'
+    - '#Unable to resolve the template type S in call to method PhpOption\\Option<mixed>::flatMap\(\)#'