Create CHANGELOG.MD

Author: desean1625

CHANGELOG.MD

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+# Version 48
+- update python
+- update dependancies
+
+# Version 47
+- Add bucket_min/bucket_max for filtering out low/high density areas
+- add time selection for geo_shapes for filtering overlap over temporal ranges
+- decrease query time by utilizing saved off parameters.
+- add tracking of x-opaque-id