Updating LICENSE file to MIT License

LICENSE

-The GitLab Enterprise Edition (EE) license (the “EE License”)
-Copyright (c) 2018 GitLab B.V.
+MIT License
 
-With regard to the GitLab Software:
+Copyright (c) 2018-present GitLab B.V.
 
-This software and associated documentation files (the "Software") may only be
-used in production, if you (and any entity that you represent) have agreed to,
-and are in compliance with, the GitLab Subscription Terms of Service, available
-at https://about.gitlab.com/terms/#subscription (the “EE Terms”), or other
-agreement governing the use of the Software, as agreed by you and GitLab,
-and otherwise have a valid GitLab Enterprise Edition subscription for the c
-orrect number of user seats. Subject to the foregoing sentence, you are free to
-modify this Software and publish patches to the Software. You agree that GitLab
-and/or its licensors (as applicable) retain all right, title and interest in and
-to all such modifications and/or patches, and all such modifications and/or
-patches may only be used, copied, modified, displayed, distributed, or otherwise
-exploited with a valid GitLab Enterprise Edition subscription for the  correct
-number of user seats.  Notwithstanding the foregoing, you may copy and modify
-the Software for development and testing purposes, without requiring a
-subscription.  You agree that GitLab and/or its licensors (as applicable) retain
-all right, title and interest in and to all such modifications.  You are not
-granted any other rights beyond what is expressly stated herein.  Subject to the
-foregoing, it is forbidden to copy, merge, publish, distribute, sublicense,
-and/or sell the Software.
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
 
 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-THE SOFTWARE.
-
-For all third party components incorporated into the GitLab Software, those
-components are licensed under the original license provided by the owner of the
-applicable component.
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.