Bump json5 and jest in /packages/unstack#15

dependabot[bot] wants to merge 1 commit intomastercolark/unstack:masterfrom

dependabot/npm_and_yarn/packages/unstack/json5-and-jest-2.2.3colark/unstack:dependabot/npm_and_yarn/packages/unstack/json5-and-jest-2.2.3Copy head branch name to clipboard