Bump engine.io, browser-sync and karma in /tools/gui - #121

Bump engine.io, browser-sync and karma in /tools/gui#121

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dependabot/npm_and_yarn/tools/gui/engine.io-and-browser-sync-and-karma-6.2.1opennetworkinglab/onos:dependabot/npm_and_yarn/tools/gui/engine.io-and-browser-sync-and-karma-6.2.1Copy head branch name to clipboard