s/ERb/ERB/
Remove yaml Proc param parser test

I don't believe this test is exercising any explicit params_parser
behavior that the other two Proc tests aren't already doing.  Given
that we now know it's a bad idea to load user input via YAML.load,
somebody reading this test might get a dangerous idea about building
out a YAML params parser.
Needs to explicitly require 'minitest/parallel_each'

Minitest has changed to require this since https://github.com/seattlerb/minitest/commit/728054b
Merge pull request #9104 from bemurphy/remove_bad_idea_parser_test

Remove yaml Proc param parser test
'minitest/parallel_each' might not always be available
Only search for enabled extension if the PostgreSQL version supports
extensions
Fix typo
Remove BestStandardsSupport middleware
Add 'X-UA-Compatible' => 'chrome=1' to default headers
Changelog about BestStandardsSupport removal