[Snyk] Security upgrade grpc from 1.24.2 to 1.24.4

[snyk-bot]

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
	768/1000 Why? Proof of Concept exploit, Recently disclosed, Has a fix available, CVSS 7.5	Prototype Pollution SNYK-JS-GRPC-598671	No	Proof of Concept

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

Check the changes in this PR to ensure they won't cause issues with your project.

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📚 Read more about Snyk's upgrade and patch logic

[codecov-io]

Codecov Report

Merging #38 (4bff1c1) into master (d99a3a2) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #38   +/-   ##
=======================================
  Coverage   99.62%   99.62%           
=======================================
  Files           1        1           
  Lines         270      270           
  Branches       65       65           
=======================================
  Hits          269      269           
  Misses          1        1           

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