Bump karma from 6.1.2 to 6.3.16 in /Angular/operator-a-day#5

dependabot[bot] wants to merge 1 commit intomastermonutam91/articles:masterfrom

dependabot/npm_and_yarn/Angular/operator-a-day/karma-6.3.16monutam91/articles:dependabot/npm_and_yarn/Angular/operator-a-day/karma-6.3.16Copy head branch name to clipboard