- Set autosquash by default.

- Added autosquash Git alias.

.gitconfig

 [alias]
     amend = commit --amend
+    autosquash = !GIT_SEQUENCE_EDITOR=true git rebase -i --autosquash
     bull = submodule update --remote
     clear = clean -fdx
     dif = diff --color-words
@@ -37,6 +38,8 @@
 [push]
     followTags = true
     default = simple
+[rebase]
+    autoSquash = true
 [receive]
     fsckObjects = true
 [tag]