submodule update

-Subproject commit 09cf84429fae16df7c7f25793ed157210fa1be78
+Subproject commit 1b47629d63f6fcdd9f22785283acf2ff4a3dcb40

CBL-624: fix: flags not carrying over(master branch) (couchbase#2599)

* fixed the issue with attachment flag not carrying over
* include unit test to verify the hasAttachmentFlag is carried over
* corrected the revisionFlag property.

submodule update (version bump)

-Subproject commit 7c33e8f1ddc7b530cb4b62ef7d3dd7af0240349b
+Subproject commit 3d38ee88b14bce0517a1c2401af68e86e11b206a

* update litecore submodule with version update

doc: update release info

- update version number 
- update documentation URL

submodule update

Subproject commit 27dac84bc0aa6d9b333a07f589ebac4b6d230566
+Subproject commit 4c40bef81acb518974498f00c84359c534cd7a31

 version update for iridium (couchbase#2487)

Update version number to 2.5.1

docs: documentation urls

docs: documentation urls