Sort font definitions for Proxima Nova bold

ProximaNovaFontFace.css

 @font-face {
     font-family: "ProximaNova";
     font-style: normal;
-    font-weight: 300;
+    font-weight: 100;
     src: url("https://style.gsc.org.uk/fonts/ProximaNova-Light.eot");
     src: url("https://style.gsc.org.uk/fonts/ProximaNova-Light.eot?#iefix") format("embedded-opentype"),
         url("https://style.gsc.org.uk/fonts/ProximaNova-Light.woff2") format("woff2"),
@@ -13,7 +13,7 @@
 @font-face {
     font-family: "ProximaNova";
     font-style: normal;
-    font-weight: 600;
+    font-weight: 200;
     src: url("https://style.gsc.org.uk/fonts/ProximaNova-Semibold.eot");
     src: url("https://style.gsc.org.uk/fonts/ProximaNova-Semibold.eot?#iefix") format("embedded-opentype"),
         url("https://style.gsc.org.uk/fonts/ProximaNova-Semibold.woff2") format("woff2"),
@@ -22,10 +22,21 @@
         url("https://style.gsc.org.uk/fonts/ProximaNova-Semibold.svg#ProximaNova-Semibold") format("svg");
 }
 
+@font-face {
+    font-family: "ProximaNova";
+    font-style: normal;
+    font-weight: 400;
+    src: url("https://style.gsc.org.uk/fonts/ProximaNova-Bold.eot");
+    src: url("https://style.gsc.org.uk/fonts/ProximaNova-Bold.eot?#iefix") format("embedded-opentype"),
+        url("https://style.gsc.org.uk/fonts/ProximaNova-Bold.woff") format("woff"),
+        url("https://style.gsc.org.uk/fonts/ProximaNova-Bold.ttf") format("truetype"),
+        url("https://style.gsc.org.uk/fonts/ProximaNova-Bold.svg#ProximaNova-Bold") format("svg");
+}
+
 @font-face {
     font-family: "ProximaNova";
     font-style: italic;
-    font-weight: 300;
+    font-weight: 100;
     src: url("https://style.gsc.org.uk/fonts/ProximaNova-LightIt.eot");
     src: url("https://style.gsc.org.uk/fonts/ProximaNova-LightIt.eot?#iefix") format("embedded-opentype"),
         url("https://style.gsc.org.uk/fonts/ProximaNova-LightIt.woff2") format("woff2"),
@@ -37,7 +48,7 @@
 @font-face {
     font-family: "ProximaNova";
     font-style: italic;
-    font-weight: 600;
+    font-weight: 200;
     src: url("https://style.gsc.org.uk/fonts/ProximaNova-SemiboldIt.eot");
     src: url("https://style.gsc.org.uk/fonts/ProximaNova-SemiboldIt.eot?#iefix") format("embedded-opentype"),
         url("https://style.gsc.org.uk/fonts/ProximaNova-SemiboldIt.woff2") format("woff2"),

package.json

 {
     "name": "@gsc/material",
-    "version": "2.2.1",
+    "version": "2.3.0",
     "description": "An implementation of Material-UI with GSC styling",
     "main": "index.js",
     "repository": "https://gitlab.gsc.org.uk/gsc-frameworks/gsc-material.git",

src/ProximaNovaFontFace.css

 @font-face {
     font-family: "ProximaNova";
     font-style: normal;
-    font-weight: 300;
+    font-weight: 100;
     src: url("https://style.gsc.org.uk/fonts/ProximaNova-Light.eot");
     src: url("https://style.gsc.org.uk/fonts/ProximaNova-Light.eot?#iefix") format("embedded-opentype"),
         url("https://style.gsc.org.uk/fonts/ProximaNova-Light.woff2") format("woff2"),
@@ -13,7 +13,7 @@
 @font-face {
     font-family: "ProximaNova";
     font-style: normal;
-    font-weight: 600;
+    font-weight: 200;
     src: url("https://style.gsc.org.uk/fonts/ProximaNova-Semibold.eot");
     src: url("https://style.gsc.org.uk/fonts/ProximaNova-Semibold.eot?#iefix") format("embedded-opentype"),
         url("https://style.gsc.org.uk/fonts/ProximaNova-Semibold.woff2") format("woff2"),
@@ -22,10 +22,21 @@
         url("https://style.gsc.org.uk/fonts/ProximaNova-Semibold.svg#ProximaNova-Semibold") format("svg");
 }
 
+@font-face {
+    font-family: "ProximaNova";
+    font-style: normal;
+    font-weight: 400;
+    src: url("https://style.gsc.org.uk/fonts/ProximaNova-Bold.eot");
+    src: url("https://style.gsc.org.uk/fonts/ProximaNova-Bold.eot?#iefix") format("embedded-opentype"),
+        url("https://style.gsc.org.uk/fonts/ProximaNova-Bold.woff") format("woff"),
+        url("https://style.gsc.org.uk/fonts/ProximaNova-Bold.ttf") format("truetype"),
+        url("https://style.gsc.org.uk/fonts/ProximaNova-Bold.svg#ProximaNova-Bold") format("svg");
+}
+
 @font-face {
     font-family: "ProximaNova";
     font-style: italic;
-    font-weight: 300;
+    font-weight: 100;
     src: url("https://style.gsc.org.uk/fonts/ProximaNova-LightIt.eot");
     src: url("https://style.gsc.org.uk/fonts/ProximaNova-LightIt.eot?#iefix") format("embedded-opentype"),
         url("https://style.gsc.org.uk/fonts/ProximaNova-LightIt.woff2") format("woff2"),
@@ -37,7 +48,7 @@
 @font-face {
     font-family: "ProximaNova";
     font-style: italic;
-    font-weight: 600;
+    font-weight: 200;
     src: url("https://style.gsc.org.uk/fonts/ProximaNova-SemiboldIt.eot");
     src: url("https://style.gsc.org.uk/fonts/ProximaNova-SemiboldIt.eot?#iefix") format("embedded-opentype"),
         url("https://style.gsc.org.uk/fonts/ProximaNova-SemiboldIt.woff2") format("woff2"),

src/themeDefinition.js

@@ -48,27 +48,21 @@ const GSCTheme = {
         ].join(","),
         h1: {
             fontFamily: "ProximaNova",
-            fontWeight: 600,
         },
         h2: {
             fontFamily: "ProximaNova",
-            fontWeight: 600,
         },
         h3: {
             fontFamily: "ProximaNova",
-            fontWeight: 600,
         },
         h4: {
             fontFamily: "ProximaNova",
-            fontWeight: 600,
         },
         h5: {
             fontFamily: "ProximaNova",
-            fontWeight: 600,
         },
         h6: {
             fontFamily: "ProximaNova",
-            fontWeight: 600,
         },
         button: {
             textTransform: "none",

themeDefinition.js

@@ -43,28 +43,22 @@ var GSCTheme = {
   typography: {
     fontFamily: ['"Helvetica Neue"', "Arial", "sans-serif", "-apple-system", "BlinkMacSystemFont", '"Segoe UI"', '"Apple Color Emoji"', '"Segoe UI Emoji"', '"Segoe UI Symbol"'].join(","),
     h1: {
-      fontFamily: "ProximaNova",
-      fontWeight: 600
+      fontFamily: "ProximaNova"
     },
     h2: {
-      fontFamily: "ProximaNova",
-      fontWeight: 600
+      fontFamily: "ProximaNova"
     },
     h3: {
-      fontFamily: "ProximaNova",
-      fontWeight: 600
+      fontFamily: "ProximaNova"
     },
     h4: {
-      fontFamily: "ProximaNova",
-      fontWeight: 600
+      fontFamily: "ProximaNova"
     },
     h5: {
-      fontFamily: "ProximaNova",
-      fontWeight: 600
+      fontFamily: "ProximaNova"
     },
     h6: {
-      fontFamily: "ProximaNova",
-      fontWeight: 600
+      fontFamily: "ProximaNova"
     },
     button: {
       textTransform: "none"