move escape-regex to ui/shared

test plan:
  - existing tests pass

flag=none

Change-Id: I5649a6a2f31cea974fac32e9bbff367e0e217007
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/316714
Tested-by: Service Cloud Jenkins <svc.cloudjenkins@instructure.com>
Reviewed-by: Charley Kline <ckline@instructure.com>
QA-Review: Aaron Shafovaloff <ashafovaloff@instructure.com>
Product-Review: Aaron Shafovaloff <ashafovaloff@instructure.com>

ui/features/discussion_topic/backbone/views/DiscussionFilterResultsView.js

@@ -21,7 +21,7 @@ import _ from 'underscore'
 import FilterEntryView from './FilterEntryView'
 import EntryCollectionView from './EntryCollectionView'
 import EntryCollection from '../collections/EntryCollection'
-import rEscape from 'escape-regex'
+import rEscape from '@canvas/escape-regex'
 
 export default class DiscussionFilterResultsView extends EntryCollectionView {
   static initClass() {

ui/shared/escape-regex/index.ts

@@ -15,6 +15,6 @@
 // You should have received a copy of the GNU Affero General Public License along
 // with this program. If not, see <http://www.gnu.org/licenses/>.
 
-export default function rEscape(string) {
+export default function rEscape(string: string): string {
   return string.replace(/[\\\^\$\*\+\?\.\(\)\|\{\}\[\]]/g, '\\$&')
 }

ui/shared/escape-regex/package.json

@@ -1,5 +1,5 @@
 {
-  "name": "escape-regex",
+  "name": "@canvas/escape-regex",
   "private": true,
   "version": "1.0.0",
   "author": "neme",

ui/shared/util/searchHelpers.js

@@ -16,7 +16,7 @@
  * with this program. If not, see <http://www.gnu.org/licenses/>.
  */
 
-import rEscape from 'escape-regex'
+import rEscape from '@canvas/escape-regex'
 
 const SearchHelpers = {
   exactMatchRegex(string) {