* lib/std/normalize/init.lua (typecheck): Use installed typecheck
module if available, or fall-back to a minimal non-typechecking
equivalent.
Remove spurious parens from all argscheck invocations.
* std.normalize-git-1.rockspec (dependencies): Move typecheck from
here...
(test_dependencies): ...to here.
* std.normalize-git-1.rockspec (rockspec_format): Bump to 3.0.
(build.type): Removed.  Defaults to builtin with 3.0.
(description.issues_url): Point at github issues.
(dependencies): Move typecheck from here...
(test_dependencies): ...to here. Add ansicolors, luacov and specl.
(build_dependencies): Add ldoc.
(build.copy_directories): Always set.

Signed-off-by: Gary V. Vaughan <gary@gnu.org>