v0.14.0

• change obx_query_prop_count() to respect case-sensitivity setting when counting distinct strings
• change OBXSyncCredentialsType values to start at 1
• add obx_query_find_first() to get a first object matching the query
• add obx_query_find_unique() to get the only object matching the query
• add obx_async_put_object4() accepting a put_mode
• updated ARMv7hf toolchain, now requires GLIBC v2.28 (e.g. Raspbian 10, Ubuntu 20.04)
• semi-internal Dart APIs: add query streaming and finalizers