Bump mocha from 2.3.4 to 6.1.3 in /javascript-client#11

dependabot-preview[bot] wants to merge 1 commit intomasterFluxNotes/treatment-options-javascript-client:masterfrom

dependabot/npm_and_yarn/javascript-client/mocha-6.1.3FluxNotes/treatment-options-javascript-client:dependabot/npm_and_yarn/javascript-client/mocha-6.1.3Copy head branch name to clipboard