fix(licence): add MIT licence

LICENCE.txt

@@ -0,0 +1,14 @@
+The MIT License (MIT)
+Copyright © 2018 Emarsys
+
+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.

package.json

@@ -17,7 +17,7 @@
     "url": "https://github.com/emartech/google-big-query-js.git"
   },
   "author": "Emarsys",
-  "license": "ISC",
+  "license": "MIT",
   "bugs": {
     "url": "https://github.com/emartech/google-big-query-js/issues"
   },