FIX: Cast float to string to Decimal round correctly, fixes #10

Author: hlouzada

labfis/uncertainty.py

@@ -229,8 +229,8 @@ def __round__(self, p: int = 0) -> labfloat:
         current_contex = getcontext()
         setcontext(self.context)
 
-        u = Decimal(self._uncertainty)
-        m = Decimal(self._mean)
+        u = Decimal(str(self._uncertainty))
+        m = Decimal(str(self._mean))
 
         r = p - u.adjusted() * (not p)