chore(deps-dev): bump cross-env from 5.2.1 to 6.0.3

Bumps [cross-env](https://github.com/kentcdodds/cross-env) from 5.2.1 to 6.0.3.
- [Release notes](https://github.com/kentcdodds/cross-env/releases)
- [Changelog](https://github.com/kentcdodds/cross-env/blob/master/CHANGELOG.md)
- [Commits](https://github.com/kentcdodds/cross-env/compare/v5.2.1...v6.0.3)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

web3.js/package-lock.json

@@ -6453,12 +6453,31 @@
       }
     },
     "cross-env": {
-      "version": "5.2.1",
+      "version": "6.0.3",
-      "resolved": "https://registry.npmjs.org/cross-env/-/cross-env-5.2.1.tgz",
+      "resolved": "https://registry.npmjs.org/cross-env/-/cross-env-6.0.3.tgz",
-      "integrity": "sha512-1yHhtcfAd1r4nwQgknowuUNfIT9E8dOMMspC36g45dN+iD1blloi7xp8X/xAIDnjHWyt1uQ8PHk2fkNaym7soQ==",
+      "integrity": "sha512-+KqxF6LCvfhWvADcDPqo64yVIB31gv/jQulX2NGzKS/g3GEVz6/pt4wjHFtFWsHMddebWD/sDthJemzM4MaAag==",
       "dev": true,
       "requires": {
-        "cross-spawn": "^6.0.5"
+        "cross-spawn": "^7.0.0"
+      },
+      "dependencies": {
+        "cross-spawn": {
+          "version": "7.0.0",
+          "resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-7.0.0.tgz",
+          "integrity": "sha512-6U/8SMK2FBNnB21oQ4+6Nsodxanw1gTkntYA2zBdkFYFu3ZDx65P2ONEXGSvob/QS6REjVHQ9zxzdOafwFdstw==",
+          "dev": true,
+          "requires": {
+            "path-key": "^3.1.0",
+            "shebang-command": "^1.2.0",
+            "which": "^1.2.9"
+          }
+        },
+        "path-key": {
+          "version": "3.1.0",
+          "resolved": "https://registry.npmjs.org/path-key/-/path-key-3.1.0.tgz",
+          "integrity": "sha512-8cChqz0RP6SHJkMt48FW0A7+qUOn+OsnOsVtzI59tZ8m+5bCSk7hzwET0pulwOM2YMn9J1efb07KB9l9f30SGg==",
+          "dev": true
+        }
       }
     },
     "cross-spawn": {

web3.js/package.json

@@ -93,7 +93,7 @@
     "babel-eslint": "10.0.3",
     "babel-plugin-module-resolver": "3.2.0",
     "codecov": "^3.0.4",
-    "cross-env": "5.2.1",
+    "cross-env": "6.0.3",
     "elfy": "^0.1.0",
     "enzyme": "3.10.0",
     "esdoc": "^1.1.0",