Upgrading core to v5.12.5 and sync to v3.14.3 (#2171)

* Upgrade core v5.12.5
* Upgrade sync v3.14.3

Author: kneth

CHANGELOG.md

@@ -6,15 +6,17 @@ x.x.x Release notes (yyyy-MM-dd)
 ### Fixed
 * <How to hit and notice issue? what was the impact?> ([#????](https://github.com/realm/realm-js/issues/????), since v?.?.?)
 * ReactNative for Android no longer uses deprecated methods and can build using Gradle 5.0 and above. ([#1995](https://github.com/realm/realm-js/issues/1995))
-* Fix occasional "FATAL ERROR: v8::String::Cast Could not convert to string" crashes when reading a property from a Realm object. ([#2172](https://github.com/realm/realm-js/pull/2172), since 2.19.0)
+* A bug caused loading the binary component of the SDK to hang on Windows. ([#2169](https://github.com/realm/realm-js/issues/2169), since v2.21.0)
+* Fix occasional `FATAL ERROR: v8::String::Cast Could not convert to string` crashes when reading a property from a Realm object. ([#2172](https://github.com/realm/realm-js/pull/2172), since v2.19.0)
 
 ### Compatibility
 * Realm Object Server: 3.11.0 or later.
 * APIs are backwards compatible with all previous release of realm in the 2.x.y series.
 * File format: Generates Realms with format v9 (Reads and upgrades all previous formats)
 
  ### Internal
-* None.
+* Upgraded to Realm Core v5.12.5 (hanging on Windows).
+* Upgraded to Realm Sync v3.14.3.
 
 2.21.0 Release notes (2018-12-3)
 =============================================================

dependencies.list

@@ -1,5 +1,5 @@
 PACKAGE_NAME=realm-js
 VERSION=2.21.0
-REALM_CORE_VERSION=5.12.3
-REALM_SYNC_VERSION=3.14.1
+REALM_CORE_VERSION=5.12.5
+REALM_SYNC_VERSION=3.14.3
 REALM_OBJECT_SERVER_VERSION=3.11.1