chore: align all MIT licenses text

Note: the owner of the `socket.io` repository was updated to Automattic
in [1], though it was never applied to the other repositories nor
mentioned in the client bundles.

[1]: 3402811

Author: darrachequesne

Diff for: LICENSE

@@ -1,6 +1,6 @@
 (The MIT License)
 
-Copyright (c) 2014-2018 Automattic <[email protected]>
+Copyright (c) 2014-present Guillermo Rauch and Socket.IO contributors
 
 Permission is hereby granted, free of charge, to any person obtaining
 a copy of this software and associated documentation files (the

Diff for: packages/engine.io-client/LICENSE

@@ -1,6 +1,6 @@
 (The MIT License)
 
-Copyright (c) 2014-2015 Automattic <[email protected]>
+Copyright (c) 2014-present Guillermo Rauch and Socket.IO contributors
 
 Permission is hereby granted, free of charge, to any person obtaining
 a copy of this software and associated documentation files (the

Diff for: packages/engine.io-parser/LICENSE

@@ -1,6 +1,6 @@
 (The MIT License)
 
-Copyright (c) 2016 Guillermo Rauch (@rauchg)
+Copyright (c) 2014-present Guillermo Rauch and Socket.IO contributors
 
 Permission is hereby granted, free of charge, to any person obtaining
 a copy of this software and associated documentation files (the

Diff for: packages/engine.io/LICENSE

@@ -1,6 +1,6 @@
 (The MIT License)
 
-Copyright (c) 2014 Guillermo Rauch <[email protected]>
+Copyright (c) 2014-present Guillermo Rauch and Socket.IO contributors
 
 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, 

Diff for: packages/socket.io-adapter/LICENSE

@@ -1,6 +1,6 @@
 (The MIT License)
 
-Copyright (c) 2014 Guillermo Rauch <[email protected]>
+Copyright (c) 2014-present Guillermo Rauch and Socket.IO contributors
 
 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

Diff for: packages/socket.io-client/LICENSE

@@ -1,7 +1,6 @@
 The MIT License (MIT)
 
-Copyright (c) 2014 Guillermo Rauch
-
+Copyright (c) 2014-present Guillermo Rauch and Socket.IO contributors
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

Diff for: packages/socket.io-parser/LICENSE

@@ -1,6 +1,6 @@
 (The MIT License)
 
-Copyright (c) 2014 Guillermo Rauch <[email protected]>
+Copyright (c) 2014-present Guillermo Rauch and Socket.IO contributors
 
 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

Diff for: packages/socket.io/LICENSE

@@ -0,0 +1,22 @@
+(The MIT License)
+
+Copyright (c) 2014-present Guillermo Rauch and Socket.IO contributors
+
+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.