Update to Quill 1.2.6

Updated

• Travis config to latest node and latest polymer process
• Quill 1.2.6

Quill 1.2.6 Changes (https://github.com/quilljs/quill/releases/tag/v1.2.6)

• Disable Grammarly by default #574
• Fix RTL list spacing #1485
• Add support for mobile Youtube links #1489

Quill 1.25 Changes (https://github.com/quilljs/quill/releases/tag/v1.2.5)

• Fix cursor shifting to be exclusive of user cursor #1367
• Fix iOS hover state on toolbar #1388
• Fix getText() for Bangla #1427
• Fix Korean character composition in Safari #1437
• Fix pasting HTML handling special class names #1445
• Fix paste or initializing with font-weight #1456
• Fix updating active picker logic #1468

Quill 1.2.4 Changes (https://github.com/quilljs/quill/releases/tag/v1.2.4)

• Fix pasting nested list #906
• Fix delete key interaction at end of list #1277
• Fix pasting whitespace prefix #1244
• Fix file dialog open speed #1265
• Fix backspace with at beginning of list interaction with meta keys #1307
• Fix pasting nested styles #1333
• Fix backspacing into an empty line should keep own formats #1339
• Fix IE11 autolinking interaction #1390
• Fix persistent focus interaction with tabbing away #1404

see https://github.com/quilljs/quill/releases