[DO NOT MERGE] wcag 2.1 hybrid updates (#232)

[increment patch] Update icons for wcag 2.1

.travis.yml

@@ -1,5 +1,6 @@
 language: node_js
-node_js: node
+node_js:
+- "11"
 addons:
   chrome: stable
 script:

README.md

@@ -48,7 +48,7 @@ Here's an example which consumes the "bookmark-filled" icon from the "tier1" cat
 <iron-icon icon="d2l-tier1:bookmark-filled"></iron-icon>
 ```
 
-You'll need to set the size (ideally 18px, 24px or 30px) and color (ferrite, `#565a5c`) of the icon. [d2l-colors](https://github.com/Brightspace/d2l-colors-ui) comes in handy:
+You'll need to set the size (ideally 18px, 24px or 30px) and color (ferrite, `#494c4e`) of the icon. [d2l-colors](https://github.com/Brightspace/d2l-colors-ui) comes in handy:
 
 ```html
 <link rel="import" href="../d2l-colors/d2l-colors.html">
@@ -271,15 +271,15 @@ When contributing changes to icons, the SVG files should be properly formatted.
   - not contain negative values
 - there should be no `<title>` element
 - there should be no inline `<style>` -- all style for line fills should be applied directly to the SVG elements
-- color of SVG elements should be "ferrite" (`#565a5c`)
+- color of SVG elements should be "ferrite" (`#494c4e`)
 
 The best way to have most of these rules applied for you automatically is to put the icon through [SVGOMG](https://jakearchibald.github.io/svgomg/) with the "remove title" and "prettify code" options selected.
 
 Here's a sample of a properly formatted SVG:
 
 ```svg
 <svg width="18" height="18" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 18 18">
-  <path fill="#565a5c" d="..."/>
+  <path fill="#494c4e" d="..."/>
 </svg>
 ```
 

cli/iconset-builder.js

@@ -17,7 +17,7 @@ var iconsetObjTemplate = {
 };
 
 function processFill(elem) {
-	if (elem.$ && elem.$.fill && elem.$.fill.toLowerCase() === '#565a5c') {
+	if (elem.$ && elem.$.fill && elem.$.fill.toLowerCase() === '#494c4e') {
 		delete elem.$.fill;
 	}
 	for (var child in elem) {