Upgrade lodash version to 4.17.12+ for helix-rest

[narendly]

Issues

• My PR addresses the following Helix issues and references them in the PR description:

Fixes #1080

Description

• Here are some details about my PR, including screenshots of any UI changes:

There was a security vulnerability found in older versions of lodash. This commit upgrades it to a version containing the fix. For details, see https://snyk.io/blog/snyk-research-team-discovers-severe-prototype-pollution-security-vulnerabilities-affecting-all-versions-of-lodash/

Tests

• The following tests are written for this issue:

No tests needed

• The following is the result of the "mvn test" command on the appropriate module:

mvn build on helix-front module

[INFO] 
[INFO] --- maven-bundle-plugin:3.5.0:bundle (default-bundle) @ helix-front ---
[INFO] 
[INFO] --- maven-site-plugin:3.2:attach-descriptor (attach-descriptor) @ helix-front ---
[INFO] 
[INFO] >>> maven-source-plugin:2.2.1:jar (attach-sources) > generate-sources @ helix-front >>>
[INFO] 
[INFO] <<< maven-source-plugin:2.2.1:jar (attach-sources) < generate-sources @ helix-front <<<
[INFO] 
[INFO] 
[INFO] --- maven-source-plugin:2.2.1:jar (attach-sources) @ helix-front ---
[INFO] Building jar: /home/hulee/mp/helix3/helix-front/target/helix-front-1.0.1-SNAPSHOT-sources.jar
[INFO] 
[INFO] --- exec-maven-plugin:1.6.0:exec (Unpack assembly) @ helix-front ---
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  09:55 min
[INFO] Finished at: 2020-06-10T11:28:09-07:00
[INFO] ------------------------------------------------------------------------

Commits

• My commits all reference appropriate Apache Helix GitHub issues in their subject lines. In addition, my commits follow the guidelines from "How to write a good git commit message":
  1. Subject is separated from body by a blank line
  2. Subject is limited to 50 characters (not including Jira issue reference)
  3. Subject does not end with a period
  4. Subject uses the imperative mood ("add", not "adding")
  5. Body wraps at 72 characters
  6. Body explains "what" and "why", not "how"

Documentation (Optional)

• In case of new functionality, my PR adds documentation in the following wiki page:

(Link the GitHub wiki you added)

Code Quality

• My diff has been formatted using helix-style.xml
  (helix-style-intellij.xml if IntelliJ IDE is used)