Fixed missed hint syntax

See #35

Author: tcalmant

javaobj/v2/beans.py

@@ -98,7 +98,7 @@ def dump(self, indent=0):
         """
         return "\t" * indent + str(self)
 
-    def validate(self) -> None:
+    def validate(self):
         """
         Validity check on the object
         """

javaobj/v2/core.py

@@ -105,7 +105,7 @@ def __init__(self, fd, transformers):
         }  # type: Dict[int, Callable[[int], ParsedJavaContent]]
 
     def run(self):
-        # type: () -> List[ParsedJavaContent]:
+        # type: () -> List[ParsedJavaContent]
         """
         Parses the input stream
         """
@@ -317,7 +317,7 @@ def _read_new_string(self, type_code):
         self._set_handle(handle, java_str)
         return java_str
 
-    def _read_classdesc(self) -> JavaClassDesc:
+    def _read_classdesc(self):
         # type: () -> JavaClassDesc
         """
         Reads a class description with its type code