Add filtering in layers

examples/earthquakes.jGIS

@@ -0,0 +1,69 @@
+{
+  "layerTree": [
+    "f907e26c-c4c8-4c2d-ad62-813f63ed9de9",
+    "0336896f-f7ce-460f-8d11-07a589ff03d8"
+  ],
+  "layers": {
+    "0336896f-f7ce-460f-8d11-07a589ff03d8": {
+      "filters": {
+        "appliedFilters": [
+          {
+            "feature": "mag",
+            "operator": ">",
+            "value": 2.47
+          }
+        ],
+        "logicalOp": "all"
+      },
+      "name": "Custom GeoJSON Layer",
+      "parameters": {
+        "color": "#865e3c",
+        "opacity": 1.0,
+        "source": "d07cc573-51fb-4ae8-965b-a0082ace7f2b",
+        "type": "circle"
+      },
+      "type": "VectorLayer",
+      "visible": true
+    },
+    "f907e26c-c4c8-4c2d-ad62-813f63ed9de9": {
+      "name": "OpenStreetMap.Mapnik Layer",
+      "parameters": {
+        "source": "5fe556bc-9938-4217-8de6-fe25aef088c2"
+      },
+      "type": "RasterLayer",
+      "visible": true
+    }
+  },
+  "options": {
+    "bearing": 0.0,
+    "latitude": 39.19439624539356,
+    "longitude": -121.55020132126549,
+    "pitch": 0.0,
+    "zoom": 4.630124252560623
+  },
+  "sources": {
+    "5fe556bc-9938-4217-8de6-fe25aef088c2": {
+      "name": "OpenStreetMap.Mapnik",
+      "parameters": {
+        "attribution": "(C) OpenStreetMap contributors",
+        "maxZoom": 19.0,
+        "minZoom": 0.0,
+        "provider": "OpenStreetMap",
+        "url": "https://tile.openstreetmap.org/{z}/{x}/{y}.png",
+        "urlParameters": {}
+      },
+      "type": "RasterSource"
+    },
+    "d07cc573-51fb-4ae8-965b-a0082ace7f2b": {
+      "name": "Custom GeoJSON Layer Source",
+      "parameters": {
+        "path": "eq.json"
+      },
+      "type": "GeoJSONSource"
+    }
+  },
+  "terrain": {
+    "exaggeration": 0.0,
+    "source": ""
+  }
+}