Fix typehints in project_euler/problem01

Author: archaengel

Diff for: project_euler/problem_01/sol2.py

@@ -6,7 +6,7 @@
 """
 
 
-def solution(n: int = 1000) -> 1000:
+def solution(n: int = 1000) -> int:
     """Returns the sum of all the multiples of 3 or 5 below n.
 
     >>> solution(3)

Diff for: project_euler/problem_01/sol3.py

@@ -6,7 +6,7 @@
 """
 
 
-def solution(n: int = 1000) -> 1000:
+def solution(n: int = 1000) -> int:
     """
     This solution is based on the pattern that the successive numbers in the
     series follow: 0+3,+2,+1,+3,+1,+2,+3.