Update CONTRIBUTING.md
Update CONTRIBUTING.md

describe test:link and fix:prettier npm targets.
gabrielbazan7/copay,fr34k8/copay,cmgustavo/copay,matiu/copay,msalcala11/copay,msalcala11/copay,matiu/copay,cmgustavo/copay,matiu/copay,gabrielbazan7/copay,gabrielbazan7/copay,fr34k8/copay,msalcala11/copay,msalcala11/copay,fr34k8/copay,matiu/copay,fr34k8/copay,gabrielbazan7/copay,cmgustavo/copay,cmgustavo/copay