Merge pull request diffpy#82 from bobleesj/patch-1

Add news file for moving tests dir and pip install . to solve CI import issue

Author: sbillinge

news/tests-dir.rst

@@ -0,0 +1,25 @@
+**Added:**
+
+* <news item>
+
+**Changed:**
+
+* <news item>
+
+**Deprecated:**
+
+* <news item>
+
+**Removed:**
+
+* <news item>
+
+**Fixed:**
+
+* Moved the tests directory from src to the root using conftest.py.
+* Fixed a circular import bug during " pip install ." in GitHub CI.
+* Renamed .py files under tests to snake_case.
+
+**Security:**
+
+* <news item>