Pin weasyprint to an earlier version because of packaging trouble with dependencies.

 - Legacy-Id: 19769

Author: rjsparks

requirements.txt

@@ -70,7 +70,7 @@ tqdm>=3.7.0
 #Trac>=1.0.10,<1.2
 Unidecode>=0.4.18,<1.2.0
 #wsgiref>=0.1.2
-weasyprint>=53.4
+weasyprint>=52.5,<53
 xml2rfc>=2.35.0
 xym>=0.4.4,!=0.4.7,<1.0
 #zxcvbn-python>=4.4.14		# Not needed until we do back-end password entropy validation