[Snyk] Security upgrade sendgrid from 1.9.2 to 5.2.3

[svcprodsec-sendgrid]

This PR was automatically created by Snyk using the credentials of a real user.

Snyk has created this PR to fix one or more vulnerable packages in the `npm` dependencies of this project.

Changes included in this PR

• Changes to the following files to upgrade the vulnerable dependencies to a fixed version:
  • package.json

Vulnerabilities that will be fixed

With an upgrade:

Severity	Priority Score (*)	Issue	Breaking Change	Exploit Maturity
	696/1000 Why? Proof of Concept exploit, Has a fix available, CVSS 7.5	Regular Expression Denial of Service (ReDoS) SNYK-JS-NTHCHECK-1586032	Yes	Proof of Concept

(*) Note that the real score may have changed since the PR was raised.

Commit messages

Package name: sendgrid

The new version differs by 220 commits.

• c29a5c4 Version Bump v5.2.2: Pull #418: Fixed #417
• 8a2436d Merge pull request #418 from SPARTAN563/fix/417-update-index-ts
• 2079172 Version Bump v5.2.1: Pull #413: Handle null and undefined values in substitutions
• 3c4f82b Merge pull request #413 from zoitravel/master
• c2a03cd fix: Update TypeScript definition to correct callback arguments for API
• 59ecaa3 Merge pull request #415 from gabrielkrell/master
• 9eaadeb Add notifications badge, text
• 4d9ea56 handle null and undefined values
• eb7bce7 Version Bump 5.2.0: Pull #410: Cast substitution values to strings
• ae8a935 Merge pull request #410 from dangerismycat/patch-1
• e218c42 Cast substitution values to strings
• ac1818c Version Bump v5.1.2: PR #399: Fix type
• d2235a0 Merge pull request #399 from zoitravel/batchId-type
• 510635a fixed `batch_id` type (string)
• b29d1c6 Merge pull request #395 from sendgrid/test_hello_world
• 617e99f Remove duplicate variable declaration
• 19b36ea Updating test to reflect Hello World Example
• 9767ae6 Version Bump v5.1.1: PR #391 Return personalizations as an array of request compatible JSON.
• c68e7d7 Merge pull request #391 from hpaul/patch-1
• 7dc8567 Return personalizations as an array of request compatible JSON.
• 4af67b1 Update README.md
• 9d448b5 Version Bump v5.1.0: #325 Run prism for tests
• 5a742e2 Correctd supported versions
• 74752b3 Prism now runs local to Travis

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