v2.7.0

What's Changed

• Add workflow for running specs by @hasghari in #29
• Update build status badge by @hasghari in #30
• Run specs against Postgres 11 by @hasghari in #32
• Update nokogiri to 1.10.8 by @hasghari in #33
• Bump rake version to 13.0.1 by @hasghari in #34
• Move CC_TEST_REPORTER_ID into GitHub secrets by @hasghari in #35
• Use Postgres 12 for specs by @hasghari in #37
• Update bundled activerecord by @hasghari in #38
• Add support for polymorphic associations by @hasghari in #39

Full Changelog: v2.6.0...v2.7.0