Make contrast text pure white on primary and secondary

Bump minor version.

package.json

 {
     "name": "@gsc/material",
-    "version": "2.3.0",
+    "version": "2.4.0",
     "description": "An implementation of Material-UI with GSC styling",
     "main": "index.js",
     "repository": "https://gitlab.gsc.org.uk/gsc-frameworks/gsc-material.git",

src/themeDefinition.js

@@ -20,11 +20,11 @@ const GSCTheme = {
     palette: {
         primary: {
             main: "#2e2d44",
-            contrastText: "#f1f4f5",
+            contrastText: "#ffffff",
         },
         secondary: {
             main: "#30b7bb",
-            contrastText: "#2e2d44",
+            contrastText: "#ffffff",
         },
         error: {
             main: "#e40426",

themeDefinition.js

@@ -26,11 +26,11 @@ var GSCTheme = {
   palette: {
     primary: {
       main: "#2e2d44",
-      contrastText: "#f1f4f5"
+      contrastText: "#ffffff"
     },
     secondary: {
       main: "#30b7bb",
-      contrastText: "#2e2d44"
+      contrastText: "#ffffff"
     },
     error: {
       main: "#e40426"