Wrok around bug in nltk 3.6 #2480

See also nltk/nltk#2690

Signed-off-by: Philippe Ombredanne <[email protected]>

Author: pombredanne

setup-mini.cfg

@@ -75,7 +75,7 @@ install_requires =
     license_expression >= 0.99
     lxml >= 4.0.0, < 5.0.0
     MarkupSafe >= 0.23
-    nltk >= 3.2, < 4.0
+    nltk >= 3.2, !=3.6, < 4.0
     packageurl_python >= 0.7.0
     pdfminer.six >= 20170720
     pefile >= 2018.8.8

setup.cfg

@@ -75,7 +75,7 @@ install_requires =
     license_expression >= 0.99
     lxml >= 4.0.0, < 5.0.0
     MarkupSafe >= 0.23
-    nltk >= 3.2, < 4.0
+    nltk >= 3.2, !=3.6, < 4.0
     packageurl_python >= 0.7.0
     pdfminer.six >= 20170720
     pefile >= 2018.8.8