Tweak versioning to reduce chance of future unpleasant suprises from 3rd party

upgrades and clean up requirements.txt.

Author: Peter Amstutz

requirements.txt

@@ -1,10 +1,3 @@
-requests
-ruamel.yaml==0.12.4
-rdflib>=4.1.
-rdflib-jsonld>=0.3.0
-mistune
-typing>=3.5.2 ; python_version>="2.7"
-avro ; python_version<"3"
+typing==3.5.2.2 ; python_version>="2.7"
 avro-python3 ; python_version>="3"
-CacheControl
-lockfile
+avro==1.8.1 ; python_version<"3"

setup.py

@@ -29,15 +29,15 @@
 
 install_requires = [
     'setuptools',
-    'requests>=1.0',
-    'ruamel.yaml == 0.12.4',
+    'requests >= 1.0',
+    'ruamel.yaml >= 0.12.4, < 0.12.5',
     'rdflib >= 4.2.0, < 4.3.0',
-    'rdflib-jsonld >= 0.3.0, <= 0.4.0',
-    'html5lib >=0.90, <= 0.9999999',
-    'mistune',
-    'typing >= 3.5.2',
-    'CacheControl',
-    'lockfile >= 0.9']
+    'rdflib-jsonld >= 0.3.0, < 0.5.0',
+    'html5lib >= 0.90, <= 0.9999999',
+    'mistune >= 0.7.3, < 0.8',
+    'typing >= 3.5.2, < 3.6',
+    'CacheControl >= 0.11.7, < 0.12',
+    'lockfile >= 0.9, < 0.13']
 
 install_requires.append("avro")  # TODO: remove me once cwltool is
 # available in Debian Stable, Ubuntu 12.04 LTS