Bump immutable from 5.1.4 to 5.1.5#577

lloc merged 1 commit intomasterlloc/Multisite-Language-Switcher:masterfrom

dependabot/npm_and_yarn/immutable-5.1.5lloc/Multisite-Language-Switcher:dependabot/npm_and_yarn/immutable-5.1.5Copy head branch name to clipboard