Bump dot-prop from 4.2.0 to 4.2.1 in /2019-11-26-async-and-lightning-talks/async-rust#5

dependabot[bot] wants to merge 1 commit intomasterrustoslo/slides:masterfrom

dependabot/npm_and_yarn/2019-11-26-async-and-lightning-talks/async-rust/dot-prop-4.2.1rustoslo/slides:dependabot/npm_and_yarn/2019-11-26-async-and-lightning-talks/async-rust/dot-prop-4.2.1Copy head branch name to clipboard