[patch] Update dependency stemmer to v2

Author: renovate[bot]

package-lock.json

@@ -22,14 +22,14 @@
     "csvtojson": "^2.0.10",
     "lodash": "^4.17.17",
     "sentiment": "^5.0.2",
-    "stemmer": "^1.0.4"
+    "stemmer": "^2.0.0"
   },
   "devDependencies": {
     "@types/csvtojson": "1.1.5",
     "@types/elasticsearch": "5.0.43",
     "@types/lodash": "4.14.192",
     "@types/node": "12.20.55",
-    "@types/stemmer": "1.0.2",
+    "@types/stemmer": "2.0.0",
     "nodemon": "2.0.22",
     "ts-node": "9.1.1",
     "typescript": "3.9.10"