vendore reraise() from six

Author: a-detiste

Diff for: ci/requirements.txt

@@ -1,6 +1,5 @@
 virtualenv>=16.6.0
 pip>=19.1.1
 setuptools>=18.0.1
-six>=1.14.0
 tox
 twine

Diff for: setup.py

@@ -64,7 +64,7 @@ def read(*names, **kwargs):
     ],
     python_requires='>=3.8',
     install_requires=[
-        # eg: "aspectlib==1.1.1", "six>=1.7",
+        # eg: "aspectlib==1.1.1",
     ],
     extras_require={
         # eg:

Diff for: src/tblib/decorators.py

@@ -1,11 +1,21 @@
 import sys
 from functools import wraps
 
-from six import reraise
-
 from . import Traceback
 
 
+def reraise(tp, value, tb=None):
+    try:
+        if value is None:
+            value = tp()
+        if value.__traceback__ is not tb:
+            raise value.with_traceback(tb)
+        raise value
+    finally:
+        value = None
+        tb = None
+
+
 class Error:
     def __init__(self, exc_type, exc_value, traceback):
         self.exc_type = exc_type