upgrade dependencies

Author: mbostock

package.json

@@ -37,11 +37,11 @@
   "sideEffects": false,
   "devDependencies": {
     "benchmark": "2",
-    "d3-array": "1.2.0 - 2",
-    "d3-dsv": "1 - 2",
+    "d3-array": "1.2.0 - 3",
+    "d3-dsv": "1 - 3",
     "d3-random": "1.1.0 - 3",
-    "eslint": "7",
-    "mocha": "8",
+    "eslint": "8",
+    "mocha": "9",
     "rollup": "2",
     "rollup-plugin-terser": "7"
   },