Add basic `_.cond` test and test for `undefined` return values.
Add basic `_.cond` test and test for `undefined` return values.

steelsojka/lodash,beaugunderson/lodash,boneskull/lodash,rlugojr/lodash,boneskull/lodash,steelsojka/lodash,beaugunderson/lodash,msmorgan/lodash,msmorgan/lodash,rlugojr/lodash