add missing PyYAML dependency

NEWS.rst

@@ -2,6 +2,13 @@
 History
 =======
 
+4.2
+---
+
+Adapt import scripts to odoo 13. import_base_import **does not work** in this version yet.
+
+Fix missing PyYAML dependency.
+
 4.1
 ---
 

setup.py

@@ -15,5 +15,6 @@
         "odoorpc==0.7.0",
         "requests_toolbelt==0.8.0",
         "python-dateutil>=2.7.0",
+        "PyYAML",
     ],
     extras_require={
@@ -18,6 +19,7 @@
     ],
     extras_require={
-        "conf2reST": ["PyYAML"],
+        # used to require PyYAML but it is used in import scripts too
+        "conf2reST": [],
         "docker": ["docker"],
         "import_sql": ["psycopg2"],
         "source_control": [