Lock c8 to version 7.1.1 to avoid breaking change in 7.1.2 (https://github.com/bcoe/c8/issues/220).
Lock c8 to version 7.1.1 to avoid breaking change in 7.1.2 (https://github.com/bcoe/c8/issues/220).

DavidAnson/markdownlint,DavidAnson/markdownlint