Better ERB keyword argument check

[casperisfine]

Later on later versions ERB.version has no prefix:

$ ruby -v
ruby 3.1.0dev (2021-10-06T06:42:37Z master d53493715c) [x86_64-darwin20]
$ ruby -rerb -e 'p ERB.version'
"2.2.3"

So It's better to check what the method parameters are like.

[yahonda]

It would be very helpful if newer version of sprockets is released because Ruby 3.2.0dev finally removes positional arguments via ruby/ruby@d12a08a
and Rails CI is failing https://buildkite.com/rails/rails/builds/84046#9e481c18-b4a7-43fc-865d-4835b863ce40