Upgrade bootstrap versions

Commit migrated from dotnet/aspnetcore@15c5dfec2e

src/Templating/src/Microsoft.DotNet.Web.Spa.ProjectTemplates/content/Angular-CSharp/ClientApp/package.json

@@ -27,7 +27,7 @@
     "rxjs": "^6.0.0",
     "zone.js": "^0.8.26",
     "aspnet-prerendering": "^3.0.1",
-    "bootstrap": "^4.1.3",
+    "bootstrap": "^4.3.1",
     "jquery": "3.3.1",
     "popper.js": "^1.14.3"
   },

src/Templating/src/Microsoft.DotNet.Web.Spa.ProjectTemplates/content/React-CSharp/ClientApp/package.json

@@ -3,7 +3,7 @@
   "version": "0.1.0",
   "private": true,
   "dependencies": {
-    "bootstrap": "^4.1.3",
+    "bootstrap": "^4.3.1",
     "jquery": "3.3.1",
     "react": "^16.0.0",
     "react-dom": "^16.0.0",

src/Templating/src/Microsoft.DotNet.Web.Spa.ProjectTemplates/content/ReactRedux-CSharp/ClientApp/package.json

@@ -3,7 +3,7 @@
   "version": "0.1.0",
   "private": true,
   "dependencies": {
-    "bootstrap": "^4.1.3",
+    "bootstrap": "^4.3.1",
     "jquery": "3.3.1",
     "react": "^16.0.0",
     "react-dom": "^16.0.0",