Update docs.

Author: cosmy1

Docs/Urho3D.dox

@@ -230,7 +230,7 @@ Urho3D uses the following third-party libraries:
 - rapidjson 1.1.0 (https://github.com/miloyip/rapidjson)
 - Recast/Detour (https://github.com/memononen/recastnavigation)
 - SDL 2.0.5 (https://www.libsdl.org)
-- SQLite 3.18.0 (https://www.sqlite.org)
+- SQLite 3.20.1 (https://www.sqlite.org)
 - StanHull (https://codesuppository.blogspot.com/2006/03/john-ratcliffs-code-suppository-blog.html)
 - stb_image 2.12 (https://nothings.org)
 - stb_image_write 1.02 (https://nothings.org)

README.md

@@ -193,7 +193,7 @@ Urho3D uses the following third-party libraries:
 - rapidjson 1.1.0 (https://github.com/miloyip/rapidjson)
 - Recast/Detour (https://github.com/memononen/recastnavigation)
 - SDL 2.0.5 (https://www.libsdl.org)
-- SQLite 3.18.0 (https://www.sqlite.org)
+- SQLite 3.20.1 (https://www.sqlite.org)
 - StanHull (https://codesuppository.blogspot.com/2006/03/john-ratcliffs-code-suppository-blog.html)
 - stb_image 2.12 (https://nothings.org)
 - stb_image_write 1.02 (https://nothings.org)