Replace timeago.js in favor of luxon in Sentry plugin

Signed-off-by: Vitor Capretz <capretzvitor@gmail.com>

plugins/sentry/package.json

@@ -38,12 +38,12 @@
     "@material-ui/core": "^4.11.0",
     "@material-ui/icons": "^4.9.1",
     "@material-ui/lab": "4.0.0-alpha.45",
+    "luxon": "^1.27.0",
     "react": "^16.13.1",
     "react-dom": "^16.13.1",
     "react-router": "6.0.0-beta.0",
     "react-sparklines": "^1.7.0",
-    "react-use": "^17.2.4",
-    "timeago.js": "^4.0.2"
+    "react-use": "^17.2.4"
   },
   "devDependencies": {
     "@backstage/cli": "^0.7.0",
@@ -53,6 +53,7 @@
     "@testing-library/react": "^11.2.5",
     "@testing-library/user-event": "^13.1.8",
     "@types/jest": "^26.0.7",
+    "@types/luxon": "^1.27.0",
     "@types/node": "^14.14.32",
     "@types/react": "^16.9",
     "cross-fetch": "^3.0.6",