chore(license): add NOTICE (microsoft#309)

arjunattam · web-flow · commit 14da8f531df4 · 2019-12-19T12:19:54.000-08:00
diff --git a/NOTICE b/NOTICE
@@ -0,0 +1,5 @@
+Playwright
+Copyright (c) Microsoft Corporation
+
+This software contains code derived from the Puppeteer project (https://github.com/puppeteer/puppeteer),
+available under the Apache 2.0 license (https://github.com/puppeteer/puppeteer/blob/master/LICENSE).
