Add option to swallow ArgumentErrors (CssParser) #418
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CssParser prior to version 1.7.1 swallowed malformed css rules silently. Starting with version 1.8.0 it threw an error for invalid CSS. The newest version of CssParser added a new option
rule_set_exceptions
to silently swallow ArgumentErrors generated from RuleSet.This PR adds a option
rule_set_exceptions
to premailer to pass on to CssParser.