Bump @metamask/utils to 8.4.0 (#71)

This includes a fix to `createSandbox` so that it assigns a unique name
to the sandbox directory. This should prevent `main.test.ts` from
failing intermittently.

package.json

@@ -50,7 +50,7 @@
     "test:watch": "jest --watch"
   },
   "dependencies": {
-    "@metamask/utils": "^8.2.0",
+    "@metamask/utils": "^8.4.0",
     "chalk": "^4.1.2",
     "dependency-graph": "^0.11.0",
     "execa": "^5.1.1",

yarn.lock

@@ -996,7 +996,7 @@ __metadata:
     "@metamask/eslint-config-jest": ^12.0.0
     "@metamask/eslint-config-nodejs": ^12.0.0
     "@metamask/eslint-config-typescript": ^12.0.0
-    "@metamask/utils": ^8.2.0
+    "@metamask/utils": ^8.4.0
     "@swc/cli": ^0.1.62
     "@swc/core": ^1.3.66
     "@types/jest": ^28.1.6
@@ -1036,9 +1036,9 @@ __metadata:
   languageName: unknown
   linkType: soft
 
-"@metamask/utils@npm:^8.2.0":
-  version: 8.2.0
-  resolution: "@metamask/utils@npm:8.2.0"
+"@metamask/utils@npm:^8.4.0":
+  version: 8.4.0
+  resolution: "@metamask/utils@npm:8.4.0"
   dependencies:
     "@ethereumjs/tx": ^4.2.0
     "@noble/hashes": ^1.3.1
@@ -1048,7 +1048,8 @@ __metadata:
     pony-cause: ^2.1.10
     semver: ^7.5.4
     superstruct: ^1.0.3
-  checksum: 1c70c0f9c375bfa3836c15d48990dbea1c3cadfd3dd69b4867667116c09c3bdeef70a0c7027f1cdea88a9913cb846dc94812ece91be7ec32e65a62e00281b04c
+    uuid: ^9.0.1
+  checksum: b0397e97bac7192f6189a8625a2dfcb56d3c2cf4dd2cb3d4e012a7e9786f04f59f6917805544bc131a6dacd2c8344e237ae43ad47429bb5eb35c6cf1248440b4
   languageName: node
   linkType: hard
 
@@ -7028,6 +7029,15 @@ __metadata:
   languageName: node
   linkType: hard
 
+"uuid@npm:^9.0.1":
+  version: 9.0.1
+  resolution: "uuid@npm:9.0.1"
+  bin:
+    uuid: dist/bin/uuid
+  checksum: 39931f6da74e307f51c0fb463dc2462807531dc80760a9bff1e35af4316131b4fc3203d16da60ae33f07fdca5b56f3f1dd662da0c99fea9aaeab2004780cc5f4
+  languageName: node
+  linkType: hard
+
 "v8-compile-cache-lib@npm:^3.0.0":
   version: 3.0.0
   resolution: "v8-compile-cache-lib@npm:3.0.0"