Update lerna package version to fix security vulnerabilities

[carolabadeer]

Issue #, if available: internal ticket

Description of changes: Updated lerna package version to latest (v5.5.2) to update versions of transitive dependencies parse-url and parse-path.

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[codecov-commenter]

Codecov Report

Merging #536 (49718e5) into master (79eb80a) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #536   +/-   ##
=======================================
  Coverage   82.36%   82.36%           
=======================================
  Files          36       36           
  Lines        1758     1758           
=======================================
  Hits         1448     1448           
  Misses        310      310           

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