Add d3-drag dependency

package.json

@@ -21,6 +21,7 @@
     "@types/d3": "^5.7.1",
     "@types/rx": "^4.1.1",
     "d3-axis": "^1.0.12",
+    "d3-drag": "^1.2.3",
     "d3-path": "^1.0.7",
     "d3-scale": "^3.0.0",
     "d3-selection": "^1.4.0",