stop tracking .lock files

beanstream-php-master/composer.lock

@@ -1,20 +0,0 @@
-{
-    "_readme": [
-        "This file locks the dependencies of your project to a known state",
-        "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
-        "This file is @generated automatically"
-    ],
-    "hash": "f9da054d18ca907c6a1e485748c85126",
-    "content-hash": "4743d72a16fc19ce129105ff123e0ed6",
-    "packages": [],
-    "packages-dev": [],
-    "aliases": [],
-    "minimum-stability": "stable",
-    "stability-flags": [],
-    "prefer-stable": false,
-    "prefer-lowest": false,
-    "platform": {
-        "php": ">=5.3.0"
-    },
-    "platform-dev": []
-}