Reapply the XBlock RequireJS -> Webpack changes

This reverts commit 105db2cf59, reversing
changes made to 447457594f.

package-lock.json

@@ -5327,9 +5327,7 @@
       "dev": true
     },
     "jasmine-jquery": {
-      "version": "2.1.1",
-      "resolved": "https://registry.npmjs.org/jasmine-jquery/-/jasmine-jquery-2.1.1.tgz",
-      "integrity": "sha1-1AleZGlEomdjI1dpqwGNnzDw1Hs=",
+      "version": "git+https://github.com/velesin/jasmine-jquery.git#ebad463d592d3fea00c69f26ea18a930e09c7b58",
       "dev": true
     },
     "jquery": {
@@ -8631,6 +8629,11 @@
         "ajv": "5.5.2"
       }
     },
+    "scriptjs": {
+      "version": "2.5.8",
+      "resolved": "https://registry.npmjs.org/scriptjs/-/scriptjs-2.5.8.tgz",
+      "integrity": "sha1-0MQ5VcLmutM7bk7fe1O4llqnyl8="
+    },
     "scss-tokenizer": {
       "version": "0.2.3",
       "resolved": "https://registry.npmjs.org/scss-tokenizer/-/scss-tokenizer-0.2.3.tgz",
@@ -9994,6 +9997,11 @@
         "setimmediate": "1.0.5"
       }
     },
+    "tinymce": {
+      "version": "4.7.6",
+      "resolved": "https://registry.npmjs.org/tinymce/-/tinymce-4.7.6.tgz",
+      "integrity": "sha512-mdbeMvCOO0ws0HXiZO9L8mDGFA9/VmDHltlt+/9qV0Fl1EWKWoPIRURHFtiFYuLKo9yjYUvYucwiZ1XfCT/91Q=="
+    },
     "tmp": {
       "version": "0.0.33",
       "resolved": "https://registry.npmjs.org/tmp/-/tmp-0.0.33.tgz",