build: bump version again

oops, need to rerelease to fix a git merge issue

Author: rawlins

CHANGELOG.md

@@ -21,4 +21,9 @@ New features:
 Fixes, improvements, changes (highlights):
  - improve and generalize lang.Binder behavior
  - enable svgling for internal tree drawing
- - improvements to the relative clause notebook
+ - improvements to the relative clause notebook
+
+ ## [0.6.8] - Vacuity improvements - 2021-10-18
+
+Fixes, improvements, changes (highlights):
+ - correctly pin the right traitlets version

lamb/__init__.py

@@ -1,6 +1,6 @@
 __all__ = ['utils', 'types', 'meta', 'lang', 'tree_mini', 'parsing', 'magics',
            'lnsetup', 'display', 'combinators']
 
-__version_info__ = (0, 6, 7)
+__version_info__ = (0, 6, 8)
 __release__ = True
 __version__ = ".".join(str(i) for i in __version_info__)