Use react-bootstrap-ss fork

The react-bootstrap project won't update their codebase for TWBS4 compat
until they're out of alpha (https://github.com/react-bootstrap/react-bootstrap/issues/1187).
So we have to work in a fork for the meantime.

admin/client/src/components/FormBuilderModal/FormBuilderModal.js

@@ -1,5 +1,5 @@
 import React from 'react';
-import { Modal } from 'react-bootstrap-4';
+import { Modal } from 'react-bootstrap-ss';
 import SilverStripeComponent from 'lib/SilverStripeComponent';
 import FormBuilder from 'components/FormBuilder/FormBuilder';
 

admin/client/src/components/PopoverField/PopoverField.js

@@ -1,5 +1,5 @@
 import React from 'react';
-import { Popover, OverlayTrigger } from 'react-bootstrap-4';
+import { Popover, OverlayTrigger } from 'react-bootstrap-ss';
 import SilverStripeComponent from 'lib/SilverStripeComponent';
 
 class PopoverField extends SilverStripeComponent {

gulpfile.js

@@ -234,8 +234,8 @@ gulp.task('bundle-lib', function bundleLib() {
     .require('tether',
       { expose: 'tether' }
     )
-    .require('react-bootstrap-4',
-      { expose: 'react-bootstrap-4' }
+    .require('react-bootstrap-ss',
+      { expose: 'react-bootstrap-ss' }
     )
     .require('react-addons-css-transition-group',
       { expose: 'react-addons-css-transition-group' }
@@ -389,7 +389,7 @@ gulp.task('bundle-legacy', function bundleLeftAndMain() {
     .external('i18nx')
     .external('lib/Router')
     .external('react-dom')
-    .external('react-bootstrap-4')
+    .external('react-bootstrap-ss')
     .external('components/FormBuilderModal/FormBuilderModal')
     .bundle()
     .on('update', bundleLeftAndMain)
@@ -432,7 +432,7 @@ gulp.task('bundle-framework', function bundleBoot() {
     .external('react-addons-test-utils')
     .external('react-dom')
     .external('tether')
-    .external('react-bootstrap-4')
+    .external('react-bootstrap-ss')
     .external('react-redux')
     .external('react-router-redux')
     .external('react-router')

npm-shrinkwrap.json

@@ -13349,17 +13349,21 @@
       "version": "0.14.8",
       "resolved": "https://registry.npmjs.org/react-addons-test-utils/-/react-addons-test-utils-0.14.8.tgz"
     },
-    "react-bootstrap-4": {
-      "version": "0.29.1",
-      "resolved": "https://registry.npmjs.org/react-bootstrap-4/-/react-bootstrap-4-0.29.1.tgz",
+    "react-bootstrap-ss": {
+      "version": "0.30.5",
+      "resolved": "https://registry.npmjs.org/react-bootstrap-ss/-/react-bootstrap-ss-0.30.5.tgz",
       "dependencies": {
         "babel-runtime": {
-          "version": "5.8.38",
-          "resolved": "https://registry.npmjs.org/babel-runtime/-/babel-runtime-5.8.38.tgz",
+          "version": "6.11.6",
+          "resolved": "https://registry.npmjs.org/babel-runtime/-/babel-runtime-6.11.6.tgz",
           "dependencies": {
             "core-js": {
-              "version": "1.2.6",
-              "resolved": "https://registry.npmjs.org/core-js/-/core-js-1.2.6.tgz"
+              "version": "2.4.1",
+              "resolved": "https://registry.npmjs.org/core-js/-/core-js-2.4.1.tgz"
+            },
+            "regenerator-runtime": {
+              "version": "0.9.5",
+              "resolved": "https://registry.npmjs.org/regenerator-runtime/-/regenerator-runtime-0.9.5.tgz"
             }
           }
         },

package.json

@@ -54,7 +54,7 @@
     "query-string": "^3.0.3",
     "react": "^0.14.8",
     "react-addons-css-transition-group": "^0.14.8",
-    "react-bootstrap-4": "^0.29.1",
+    "react-bootstrap-ss": "^0.30.5",
     "react-dom": "^0.14.8",
     "react-redux": "^4.4.1",
     "react-router": "^2.4.1",