JS: Support react-native-base64

Author: asgerf

javascript/ql/src/semmle/javascript/Base64.qll

@@ -150,7 +150,8 @@ private class NpmBase64Encode extends Base64::Encode::Range, DataFlow::CallNode
       enc = DataFlow::moduleMember("base64url", "toBase64") or
       enc = DataFlow::moduleMember("js-base64", "Base64").getAPropertyRead("encode") or
       enc = DataFlow::moduleMember("js-base64", "Base64").getAPropertyRead("encodeURI") or
-      enc = DataFlow::moduleMember("urlsafe-base64", "encode")
+      enc = DataFlow::moduleMember("urlsafe-base64", "encode") or
+      enc = DataFlow::moduleMember("react-native-base64", ["encode", "encodeFromByteArray"])
     |
       this = enc.getACall()
     )
@@ -186,7 +187,8 @@ private class NpmBase64Decode extends Base64::Decode::Range, DataFlow::CallNode
       dec = DataFlow::moduleMember("base64url", "decode") or
       dec = DataFlow::moduleMember("base64url", "fromBase64") or
       dec = DataFlow::moduleMember("js-base64", "Base64").getAPropertyRead("decode") or
-      dec = DataFlow::moduleMember("urlsafe-base64", "decode")
+      dec = DataFlow::moduleMember("urlsafe-base64", "decode") or
+      dec = DataFlow::moduleMember("react-native-base64", "decode")
     |
       this = dec.getACall()
     )