Add some open source licenses (#90)

deny.toml

@@ -37,6 +37,8 @@ allow = [
     "MIT",
     "Apache-2.0",
     "Unicode-DFS-2016",
+    "Zlib",
+    "Unicode-3.0",
 ]
 # The confidence threshold for detecting a license from license text.
 # The higher the value, the more closely the license text must be to the