Update Normalize to v5.0.0.

scss/_normalize.scss

-/*! normalize.css v4.2.0 | MIT License | github.com/necolas/normalize.css */
+/*! normalize.css v5.0.0 | MIT License | github.com/necolas/normalize.css */
 
 //
 // 1. Change the default font family in all browsers (opinionated).
 // 2. Correct the line height in all browsers.
-// 3. Prevent adjustments of font size after orientation changes in IE and iOS.
+// 3. Prevent adjustments of font size after orientation changes in
+//    IE on Windows Phone and in iOS.
 //
 
+// Document
+// ==========================================================================
+
 html {
   font-family: sans-serif; // 1
   line-height: 1.15; // 2
@@ -13,6 +17,9 @@ html {
   -webkit-text-size-adjust: 100%; // 3
 }
 
+// Sections
+// ==========================================================================
+
 //
 // Remove the margin in all browsers (opinionated).
 //
@@ -21,69 +28,73 @@ body {
   margin: 0;
 }
 
-// HTML5 display definitions
-// ==========================================================================
-
 //
 // Add the correct display in IE 9-.
-// 1. Add the correct display in Edge, IE, and Firefox.
-// 2. Add the correct display in IE.
 //
 
 article,
 aside,
-details, // 1
-figcaption,
-figure,
 footer,
 header,
-main, // 2
-menu,
 nav,
-section,
-summary { // 1
+section {
   display: block;
 }
 
+//
+// Correct the font size and margin on `h1` elements within `section` and
+// `article` contexts in Chrome, Firefox, and Safari.
+//
+
+h1 {
+  font-size: 2em;
+  margin: 0.67em 0;
+}
+
+// Grouping content
+// ==========================================================================
+
 //
 // Add the correct display in IE 9-.
+// 1. Add the correct display in IE.
 //
 
-audio,
-canvas,
-progress,
-video {
-  display: inline-block;
+figcaption,
+figure,
+main { // 1
+  display: block;
 }
 
 //
-// Add the correct display in iOS 4-7.
+// Add the correct margin in IE 8.
 //
 
-audio:not([controls]) {
-  display: none;
-  height: 0;
+figure {
+  margin: 1em 40px;
 }
 
 //
-// Add the correct vertical alignment in Chrome, Firefox, and Opera.
+// 1. Add the correct box sizing in Firefox.
+// 2. Show the overflow in Edge and IE.
 //
 
-progress {
-  vertical-align: baseline;
+hr {
+  box-sizing: content-box; // 1
+  height: 0; // 1
+  overflow: visible; // 2
 }
 
 //
-// Add the correct display in IE 10-.
-// 1. Add the correct display in IE.
+// 1. Correct the inheritance and scaling of font size in all browsers.
+// 2. Correct the odd `em` font sizing in all browsers.
 //
 
-template, // 1
-[hidden] {
-  display: none;
+pre {
+  font-family: monospace, monospace; // 1
+  font-size: 1em; // 2
 }
 
-// Links
+// Text-level semantics
 // ==========================================================================
 
 //
@@ -106,9 +117,6 @@ a:hover {
   outline-width: 0;
 }
 
-// Text-level semantics
-// ==========================================================================
-
 //
 // 1. Remove the bottom border in Firefox 39-.
 // 2. Add the correct text decoration in Chrome, Edge, IE, Opera, and Safari.
@@ -139,21 +147,23 @@ strong {
 }
 
 //
-// Add the correct font style in Android 4.3-.
+// 1. Correct the inheritance and scaling of font size in all browsers.
+// 2. Correct the odd `em` font sizing in all browsers.
 //
 
-dfn {
-  font-style: italic;
+code,
+kbd,
+samp {
+  font-family: monospace, monospace; // 1
+  font-size: 1em; // 2
 }
 
 //
-// Correct the font size and margin on `h1` elements within `section` and
-// `article` contexts in Chrome, Firefox, and Safari.
+// Add the correct font style in Android 4.3-.
 //
 
-h1 {
-  font-size: 2em;
-  margin: 0.67em 0;
+dfn {
+  font-style: italic;
 }
 
 //
@@ -198,61 +208,44 @@ sup {
 // ==========================================================================
 
 //
-// Remove the border on images inside links in IE 10-.
-//
-
-img {
-  border-style: none;
-}
-
-//
-// Hide the overflow in IE.
+// Add the correct display in IE 9-.
 //
 
-svg:not(:root) {
-  overflow: hidden;
+audio,
+video {
+  display: inline-block;
 }
 
-// Grouping content
-// ==========================================================================
-
 //
-// 1. Correct the inheritance and scaling of font size in all browsers.
-// 2. Correct the odd `em` font sizing in all browsers.
+// Add the correct display in iOS 4-7.
 //
 
-code,
-kbd,
-pre,
-samp {
-  font-family: monospace, monospace; // 1
-  font-size: 1em; // 2
+audio:not([controls]) {
+  display: none;
+  height: 0;
 }
 
 //
-// Add the correct margin in IE 8.
+// Remove the border on images inside links in IE 10-.
 //
 
-figure {
-  margin: 1em 40px;
+img {
+  border-style: none;
 }
 
 //
-// 1. Add the correct box sizing in Firefox.
-// 2. Show the overflow in Edge and IE.
+// Hide the overflow in IE.
 //
 
-hr {
-  box-sizing: content-box; // 1
-  height: 0; // 1
-  overflow: visible; // 2
+svg:not(:root) {
+  overflow: hidden;
 }
 
 // Forms
 // ==========================================================================
 
 //
-// 1. Change font properties to `inherit` in all browsers (opinionated).
+// 1. Change the font styles in all browsers (opinionated).
 // 2. Remove the margin in Firefox and Safari.
 //
 
@@ -261,18 +254,12 @@ input,
 optgroup,
 select,
 textarea {
-  font: inherit; // 1
+  font-family: sans-serif; // 1
+  font-size: 100%; // 1
+  line-height: 1.15; // 1
   margin: 0; // 2
 }
 
-//
-// Restore the font weight unset by the previous rule.
-//
-
-optgroup {
-  font-weight: $font-weight-bold;
-}
-
 //
 // Show the overflow in IE.
 // 1. Show the overflow in Edge.
@@ -355,6 +342,16 @@ legend {
   white-space: normal; // 1
 }
 
+//
+// 1. Add the correct display in IE 9-.
+// 2. Add the correct vertical alignment in Chrome, Firefox, and Opera.
+//
+
+progress {
+  display: inline-block; // 1
+  vertical-align: baseline; // 2
+}
+
 //
 // Remove the default vertical scrollbar in IE.
 //
@@ -394,7 +391,7 @@ textarea {
 }
 
 //
-// Remove the inner padding and cancel buttons in Chrome and Safari on OS X.
+// Remove the inner padding and cancel buttons in Chrome and Safari on macOS.
 //
 
 [type="search"]::-webkit-search-cancel-button,
@@ -402,15 +399,6 @@ textarea {
   -webkit-appearance: none;
 }
 
-//
-// Correct the text style of placeholders in Chrome, Edge, and Safari.
-//
-
-::-webkit-input-placeholder {
-  color: inherit;
-  opacity: 0.54;
-}
-
 //
 // 1. Correct the inability to style clickable types in iOS and Safari.
 // 2. Change font properties to `inherit` in Safari.
@@ -420,3 +408,54 @@ textarea {
   -webkit-appearance: button; // 1
   font: inherit; // 2
 }
+
+// Interactive
+// ==========================================================================
+
+//
+// Add the correct display in IE 9-.
+// 1. Add the correct display in Edge, IE, and Firefox.
+//
+
+details, // 1
+menu {
+  display: block;
+}
+
+//
+// Add the correct display in all browsers.
+//
+
+summary {
+  display: list-item;
+}
+
+// Scripting
+// ==========================================================================
+
+//
+// Add the correct display in IE 9-.
+//
+
+canvas {
+  display: inline-block;
+}
+
+//
+// Add the correct display in IE.
+//
+
+template {
+  display: none;
+}
+
+// Hidden
+// ==========================================================================
+
+//
+// Add the correct display in IE 10-.
+//
+
+[hidden] {
+  display: none;
+}