Reduce tiling memory (#227)

* Trying to reduce memory in tiling

* Let the simplification workers go out of scope earlier

* Bail out quickly once the maximum feature count is reached

* Update changelog and version

CHANGELOG.md

@@ -1,3 +1,7 @@
+# 2.53.0
+
+* Stop trying to add features to the tile after the feature limit is reached
+
 # 2.52.0
 
 * Fix accidental loss (at all zooms) of features that specify an explicit minzoom