Update _Source Serif Pro_ to _Source Serif_ v4.004

And add woff2 files

Author: Nemo157

static/SourceSerif4-Bold.ttf.woff

@@ -1,4 +1,4 @@
-Copyright 2014-2018 Adobe (http://www.adobe.com/), with Reserved Font Name 'Source'. All Rights Reserved. Source is a trademark of Adobe in the United States and/or other countries.
+Copyright 2014-2021 Adobe (http://www.adobe.com/), with Reserved Font Name 'Source'. All Rights Reserved. Source is a trademark of Adobe in the United States and/or other countries.
 
 This Font Software is licensed under the SIL Open Font License, Version 1.1.
 

static/SourceSerif4-Bold.ttf.woff2

@@ -2,7 +2,7 @@
 
 // Fonts
 $font-family-sans: "Fira Sans", "Helvetica Neue", Helvetica, Arial, sans-serif;
-$font-family-serif: "Source Serif Pro", Georgia, Times, "Times New Roman", serif;
+$font-family-serif: "Source Serif", Georgia, Times, "Times New Roman", serif;
 $font-family-mono: "Source Code Pro", Menlo, Monaco, Consolas, "DejaVu Sans Mono", Inconsolata, monospace;
 
 // Sizes

static/SourceSerif4-It.ttf.woff

@@ -15,24 +15,33 @@
     src: local('Fira Sans Medium'), url("FiraSans-Medium.woff") format('woff');
 }
 
-/* See SourceSerifPro-LICENSE.txt for the Source Serif Pro license. */
+/* See SourceSerif4-LICENSE.md for the Source Serif 4 license. */
 @font-face {
-    font-family: 'Source Serif Pro';
+    font-family: 'Source Serif';
     font-style: normal;
     font-weight: 400;
-    src: local('Source Serif Pro'), url("SourceSerifPro-Regular.ttf.woff") format('woff');
+    src:
+      local('Source Serif 4'),
+      url("SourceSerif4-Regular.ttf.woff2") format('woff2'),
+      url("SourceSerif4-Regular.ttf.woff") format('woff');
 }
 @font-face {
-    font-family: 'Source Serif Pro';
+    font-family: 'Source Serif';
     font-style: italic;
     font-weight: 400;
-    src: local('Source Serif Pro Italic'), url("SourceSerifPro-It.ttf.woff") format('woff');
+    src:
+      local('Source Serif 4'),
+      url("SourceSerif4-It.ttf.woff2") format('woff2'),
+      url("SourceSerif4-It.ttf.woff") format('woff');
 }
 @font-face {
-    font-family: 'Source Serif Pro';
+    font-family: 'Source Serif';
     font-style: normal;
     font-weight: 700;
-    src: local('Source Serif Pro Bold'), url("SourceSerifPro-Bold.ttf.woff") format('woff');
+    src:
+      local('Source Serif 4'),
+      url("SourceSerif4-Bold.ttf.woff2") format('woff2'),
+      url("SourceSerif4-Bold.ttf.woff") format('woff');
 }
 
 /* See SourceCodePro-LICENSE.md for the Source Code Pro license. */