Fix high severity vulnerabilities.

[kialam]

SUMMARY

Fix some Dependabot security warnings.
Cut down the number of high security vulnerabilities to 6.
Note: the one high security vulnerability for the nth-check dependency lives within a dev dependency (react-scripts) and is unlikely to pose a real threat to our builds. There is also an open PR to address the security concern on their end, it is currently under review.

ISSUE TYPE

• Bug, Docs Fix or other nominal change

COMPONENT NAME

• UI

[keithjgrant]

We should probably bump these versions in package.json too

[kialam]

@keithjgrant Done. I was unable to upgrade d3 as it's already at the latest version, however the package-lock change should update the dev dep d3-color to what we need.

[AlexSCorey]

@kialam just need to add some licenses for get the api-test to pass

 license file source-map.txt does not correspond to an existing requirement; it should be removed.
 license for requirement babel-helper-string-parser is missing
 license for requirement jridgewell-gen-mapping is missing
 license for requirement jridgewell-resolve-uri is missing
 license for requirement jridgewell-set-array is missing
 license for requirement jridgewell-sourcemap-codec is missing
 license for requirement jridgewell-trace-mapping is missing