pin upper version of ruamel.yaml package

Author: manu-chroma

requirements.txt

@@ -1,7 +1,7 @@
 typing==3.5.3
 avro-python3 ; python_version>="3"
 avro==1.8.1 ; python_version<"3"
-ruamel.yaml==0.15.2
+ruamel.yaml>=0.12.4, <0.15
 rdflib==4.2.2
 rdflib-jsonld==0.4.0
 mistune==0.7.3

setup.py

@@ -30,7 +30,7 @@
 install_requires = [
     'setuptools',
     'requests >= 1.0',
-    'ruamel.yaml >= 0.12.4, <= 0.15.2',
+    'ruamel.yaml >= 0.12.4, < 0.15',
     'rdflib >= 4.2.2, < 4.3.0',
     'rdflib-jsonld >= 0.3.0, < 0.5.0',
     'mistune >= 0.7.3, < 0.8',