fix: package.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-Y18N-1021887

package.json

@@ -58,7 +58,7 @@
     "moment": "^2.22.2",
     "node-ipc": "^9.1.1",
     "numeral": "^2.0.6",
-    "nunjucks": "3.0.1",
+    "nunjucks": "3.2.1",
     "performance-now": "^2.1.0",
     "request": "^2.88.0",
     "routes": "^2.1.0",
@@ -69,7 +69,7 @@
     "striptags": "^3.1.1",
     "supertest": "^3.0.0",
     "through2": "^2.0.5",
-    "transliteration": "^1.6.6",
+    "transliteration": "^2.2.0",
     "vinyl": "^2.2.0",
     "xregexp": "^4.2.0"
   },