Update chart.js to version 2.1.0 🚀

[greenkeeperio-bot]

Hello :wave:

:rocket::rocket::rocket:

chart.js just published its new version 2.1.0, which is not covered by your current version range.

If this pull request passes your tests you can publish your software with the latest version of chart.js – otherwise use this branch to work on adaptions and fixes.

Happy fixing and merging :palm_tree:

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The new version differs by 1445 commits .

• 2ee37e1 2.1.0 build
• c2cc3fb Feature #73 - Horizontal Bar Chart (#2448)
• 60dbf49 Merge pull request #2433 from vincchan/fix-doc-links-anchors
• 29606ae changes repo link to chartjs org
• adacef8 fixes several anchors
• 3837330 Improve time scale for zoom and pan
• 81a5b4e Updated build
• cb54f30 Implement getValueForPixel for category scale
• 56411bd Increase tolerance for CI
• 6df9b24 Merge from feature/pan-support
• 99c2d67 Merge pull request #2421 from mchateloin/pie-demo-randomize-colors
• 3067249 Randomize data button randomizes colors in pie chart demo
• adc430f Include correct script in pie custom tooltips sample
• 7cbc08a Add license field to package files
• 516bf6a Merge pull request #2412 from zachpanz88/patch-3

There are 250 commits in total. See the full diff.

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