fix: package.json, package-lock.json & .snyk to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-AWSSDK-1059424
- https://snyk.io/vuln/SNYK-JS-CONVICT-1062508
- https://snyk.io/vuln/SNYK-JS-DATEANDTIME-1054430
- https://snyk.io/vuln/SNYK-JS-JSONBIGINT-608659
- https://snyk.io/vuln/SNYK-JS-MERGE-1040469
- https://snyk.io/vuln/SNYK-JS-MERGE-1042987
- https://snyk.io/vuln/SNYK-JS-NODEFETCH-674311
- https://snyk.io/vuln/SNYK-JS-NODEMAILER-1296415
- https://snyk.io/vuln/SNYK-JS-REDIS-1255645
- https://snyk.io/vuln/SNYK-JS-UAPARSERJS-1023599
- https://snyk.io/vuln/SNYK-JS-UAPARSERJS-1072471
- https://snyk.io/vuln/SNYK-JS-UAPARSERJS-610226
- https://snyk.io/vuln/SNYK-JS-VALIDATOR-1090599
- https://snyk.io/vuln/SNYK-JS-VALIDATOR-1090600
- https://snyk.io/vuln/SNYK-JS-VALIDATOR-1090601
- https://snyk.io/vuln/SNYK-JS-VALIDATOR-1090602
- https://snyk.io/vuln/SNYK-JS-YARGSPARSER-560381


The following vulnerabilities are fixed with a Snyk patch:
- https://snyk.io/vuln/SNYK-JS-LODASH-567746

.snyk

@@ -0,0 +1,10 @@
+# Snyk (https://snyk.io) policy file, patches or ignores known vulnerabilities.
+version: v1.21.5
+ignore: {}
+# patches apply the minimum changes required to fix a vulnerability
+patch:
+  SNYK-JS-LODASH-567746:
+    - selenium-standalone > lodash:
+        patched: '2021-07-26T08:52:42.686Z'
+    - selenium-standalone > async > lodash:
+        patched: '2021-07-26T08:52:42.686Z'