feat(math): adding nan and inf test on strings

Author: SuperFola

tests/math-tests.ark

@@ -9,7 +9,9 @@
         (test:eq (builtin__math:floor 5) (math:floor 5))
         (test:eq (builtin__math:round 5) (math:round 5))
         (test:eq (builtin__math:NaN? 5) (math:NaN? 5))
+        (test:expect (not (math:NaN? "hello")))
         (test:eq (builtin__math:Inf? 5) (math:Inf? 5))
+        (test:expect (not (math:Inf? "hello")))
         (test:eq builtin__math:pi math:pi)
         (test:eq builtin__math:e math:e)
         (test:eq builtin__math:tau math:tau)