fix: package.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-REQUEST-3361831
- https://snyk.io/vuln/SNYK-JS-TOUGHCOOKIE-5672873
- https://snyk.io/vuln/SNYK-JS-URLREGEX-569472
- https://snyk.io/vuln/SNYK-JS-XML2JS-5414874

package.json

@@ -67,7 +67,7 @@
     "bodymovin-to-smil": "^1.0.6",
     "escodegen": "^2.0.0",
     "esprima": "^4.0.1",
-    "jimp": "^0.2.28",
+    "jimp": "^0.3.7",
     "jszip": "^3.2.2",
     "png-to-jpeg": "^1.0.1",
     "react": "^15.4.2",