**New Features**:
- Added auth support for ee service account [1220](https://github.com/giswqs/geemap/pull/1220)
- Added a mosaic function [1219](https://github.com/giswqs/geemap/pull/1219)
- Added download_ned function [1218](https://github.com/giswqs/geemap/pull/1218)
API References:
- ee_initialize(): https://geemap.org/common/#geemap.common.ee_initialize
- mosaic(): https://geemap.org/common/#geemap.common.mosaic
- download_ned(): https://geemap.org/common/#geemap.common.download_ned