Bump jquery-rails from 4.3.5 to 4.4.0

Bumps jquery-rails from 4.3.5 to 4.4.0.

Changelog

Sourced from jquery-rails's changelog.

4.4.0

• update jquery to 3.5.1 (note: 3.5.0 contains important security updates)
• unescape dollar signs and backticks in assert_select_jquery to match Rails updated behavior.

Commits

• a8b003d Release v4.4.0
• 90826fd Bump jQuery version to 3.5.1
• ad3227e Test against latest Ruby versions
• 6361d43 Merge pull request #269 from repinel/fix-unescape-js
• b6d6e25 Fix unescape_js to match changes in Action View
• See full diff in compare view