zhangyan/mini-prog @ cb190f3c6676770ca8085c6f609659c928e80f1a

zhangyan 51740761f5 feat: fix gps map projection and update map config		2 hete
..
projection.ts	51740761f5 feat: fix gps map projection and update map config	2 hete
remoteMapConfig.ts	1ecb4809df feat: load remote map config and constrain tile bounds	2 hete
tile.ts	03abe28d8c feat: initialize mini program map engine	2 hete
util.ts	03abe28d8c feat: initialize mini program map engine	2 hete