Clean NPM dependencies and resolve Dependabot vulnerabilities
Addresses Dependabot issues: https://git.eliatra.com/eliatra-suite/eliatra-suite-dashboards-plugin/-/issues/13 https://git.eliatra.com/eliatra-suite/eliatra-suite-dashboards-plugin/-/issues/14 https://git.eliatra.com/eliatra-suite/eliatra-suite-dashboards-plugin/-/issues/15 https://git.eliatra.com/eliatra-suite/eliatra-suite-dashboards-plugin/-/issues/16 https://git.eliatra.com/eliatra-suite/eliatra-suite-dashboards-plugin/-/issues/17 https://git.eliatra.com/eliatra-suite/eliatra-suite-dashboards-plugin/-/issues/18 https://git.eliatra.com/eliatra-suite/eliatra-suite-dashboards-plugin/-/issues/19
Cleaning was done in a similar fashion to Search Guard cleanup. All removed libraries were not used in the repository. https://git.floragunn.com/search-guard/search-guard-kibana-plugin/-/merge_requests/799