cross-env to devDependencies (#1326)

Author: mbostock

package.json

@@ -63,7 +63,6 @@
     "acorn": "^8.11.2",
     "acorn-walk": "^8.3.0",
     "ci-info": "^4.0.0",
-    "cross-env": "^7.0.3",
     "cross-spawn": "^7.0.3",
     "d3-array": "^3.2.4",
     "d3-hierarchy": "^3.1.2",
@@ -112,6 +111,7 @@
     "chai": "^4.3.10",
     "chai-http": "^4.4.0",
     "concurrently": "^8.2.2",
+    "cross-env": "^7.0.3",
     "d3-dsv": "^3.0.1",
     "d3-format": "^3.1.0",
     "eslint": "^8.50.0",