Made the default cases for isType() and typeCheck() into errors, moving the return-false behavior into specific branches.
Made the default cases for isType() and typeCheck() into errors, moving the return-false behavior into specific branches.

rocketnia/era-cene,era-platform/cene,era-platform/cene,rocketnia/era,rocketnia/era-cene,rocketnia/era,rocketnia/era-cene,era-platform/cene,rocketnia/era