chore(deps-dev): bump @popperjs/core

Bumps [@popperjs/core](https://github.com/popperjs/popper-core) from 2.8.3 to 2.8.4.
- [Release notes](https://github.com/popperjs/popper-core/releases)
- [Commits](https://github.com/popperjs/popper-core/compare/v2.8.3...v2.8.4)

Signed-off-by: dependabot[bot] <support@github.com>
diff --git a/tobago-theme/tobago-theme-standard/npm/package-lock.json b/tobago-theme/tobago-theme-standard/npm/package-lock.json
index cfca8f4..624dfb9 100644
--- a/tobago-theme/tobago-theme-standard/npm/package-lock.json
+++ b/tobago-theme/tobago-theme-standard/npm/package-lock.json
@@ -719,9 +719,9 @@
       }
     },
     "@popperjs/core": {
-      "version": "2.8.3",
-      "resolved": "https://registry.npmjs.org/@popperjs/core/-/core-2.8.3.tgz",
-      "integrity": "sha512-olsVs3lo8qKycPoWAUv4bMyoTGVXsEpLR9XxGk3LJR5Qa92a1Eg/Fj1ATdhwtC/6VMaKtsz1nSAeheD2B2Ru9A==",
+      "version": "2.8.4",
+      "resolved": "https://registry.npmjs.org/@popperjs/core/-/core-2.8.4.tgz",
+      "integrity": "sha512-h0lY7g36rhjNV8KVHKS3/BEOgfsxu0AiRI8+ry5IFBGEsQFkpjxtcpVc9ndN8zrKUeMZXAWMc7eQMepfgykpxQ==",
       "dev": true
     },
     "@rollup/plugin-node-resolve": {
diff --git a/tobago-theme/tobago-theme-standard/npm/package.json b/tobago-theme/tobago-theme-standard/npm/package.json
index 326e8d8..2324bc4 100644
--- a/tobago-theme/tobago-theme-standard/npm/package.json
+++ b/tobago-theme/tobago-theme-standard/npm/package.json
@@ -55,7 +55,7 @@
   "dependencies": {},
   "devDependencies": {
     "tobago-core": "file:../../../tobago-core/npm",
-    "@popperjs/core": "^2.8.3",
+    "@popperjs/core": "^2.8.4",
     "@types/jest": "^26.0.15",
     "@typescript-eslint/eslint-plugin": "^4.15.2",
     "@typescript-eslint/parser": "^4.15.2",