try explicitly including git dir

Charlotte Godley · Charlotte Godley · commit 81fe82655dd1 · 2019-10-18T12:10:24.000+01:00
diff --git a/MANIFEST.in b/MANIFEST.in
@@ -1,2 +1,3 @@
 include versioneer.py
 include dotscience/_version.py
+include .git/

Original file line number	Diff line number	Diff line change
`@@ -1,2 +1,3 @@`
`1`	`1`	`include versioneer.py`
`2`	`2`	`include dotscience/_version.py`
	`3`	`+include .git/`