add missing notice file

splitice · splitice · commit 8475a9c3c3f1 · 2021-07-24T03:46:24.000+10:00
diff --git a/NOTICE b/NOTICE
@@ -0,0 +1,4 @@
+simple-cache
+Copyright X4B
+
+This product includes software developed at X4B (https://www.x4b.net) and released under the Apache 2.0 license.
