correct typing and fix a bug

gso/schemas/types.py

@@ -13,7 +13,7 @@ class LatitudeCoordinate(ConstrainedStr):
 
     """
 
-    regex = re.compile(r"^[-+]?([1-8]?\d(\.\d+)?|90(\.0+)?)$")
+    regex = re.compile(r"^-?([1-8]?\d(\.\d+)?|90(\.0+)?)$")
 
     @classmethod
     def validate(cls, value: Union[str]) -> Union[str]:
@@ -32,7 +32,7 @@ class LongitudeCoordinate(ConstrainedStr):
 
     """
 
-    regex = re.compile(r"^[-+]?(180(\.0+)?|((1[0-7]\d)|([1-9]?\d))(\.\d+)?)$")
+    regex = re.compile(r"^-?(180(\.0+)?|((1[0-7]\d)|([1-9]?\d))(\.\d+)?)$")
 
     @classmethod
     def validate(cls, value: Union[str]) -> Union[str]: