Upgrade: Bump chartkick from 3.4.2 to 4.0.5

[dependabot-preview]

Bumps chartkick from 3.4.2 to 4.0.5.

Changelog

Sourced from chartkick's changelog.

4.0.5 (2021-07-07)

• Updated Chartkick.js to 4.0.5
• Updated Chart.js to 3.4.1

4.0.4 (2021-05-01)

• Updated Chartkick.js to 4.0.4
• Updated Chart.js to 3.2.1

4.0.3 (2021-04-10)

• Updated Chartkick.js to 4.0.3
• Updated Chart.js to 3.1.0

4.0.2 (2021-04-06)

• Updated Chartkick.js to 4.0.2

4.0.1 (2021-04-06)

• Fixed error with Uglifier
• Updated Chartkick.js to 4.0.1

4.0.0 (2021-04-04)

• Added support for Chart.js 3
• Added loading option
• Made charts deferrable by default
• Set nonce automatically when present
• Prefer empty over messages: {empty: ...}
• Removed support for Ruby < 2.6 and Rails < 5.2
• Updated Chartkick.js to 4.0.0

Breaking changes

• Removed support for Chart.js 2

Commits

• 3c42046 Version bump to 4.0.5 [skip ci]
• 7cb3064 Updated Chart.js to 3.4.1 [skip ci]
• b6a00f4 Updated Chartkick.js to 4.0.5 [skip ci]
• 10d440f Updated Chart.js to 3.3.2
• d27c58d Version bump to 4.0.4 [skip ci]
• 007e35f Updated Chart.js to 3.2.1 [skip ci]
• b4a4648 Updated Chartkick.js to 4.0.4 - fixes #566 and fixes #567
• 07f04ee Use import in readme [skip ci]
• 307cbe8 Version bump to 4.0.3 [skip ci]
• a3d2c40 Updated Chart.js to 3.1.0, take 2 [skip ci]
• Additional commits viewable in compare view

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