deduplicate yarn.lock

refs DE-397

De-duplicating yarn.lock is necessary for some future InstUI upgrade work. In order to do this, we need to patch karma-webpack to avoid watching too many files within our JS job. We also need to pin babel-plugin-dynamic-import-node to the latest to work around a breaking change that causes “request of a dependency is an expression”.

Both of these version pins are work arounds and will be addressed by our efforts to upgrade webpack to v5.

Test Plan:
1. Ensure that “yarn dedupe-yarn” does not produce any file changes.
2. Ensure that the “JS (Karma)” job does not produce any warnings like “request of a dependency is an expression”
3. Ensure that the “JS (Karma)” job does not produce any warnings like “System limit for number of file watchers reached”
4. Ensure that Canvas front-end builds & behaves properly

Change-Id: I94d77bd775bc12f9f96ac44640c862ff3e3dee79
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/256674
Tested-by: Service Cloud Jenkins <svc.cloudjenkins@instructure.com>
Reviewed-by: Ahmad Amireh <ahmad@instructure.com>
QA-Review: Ahmad Amireh <ahmad@instructure.com>
Product-Review: Ahmad Amireh <ahmad@instructure.com>

package.json

@@ -254,7 +254,8 @@
     "karma-sourcemap-loader": "^0.3",
     "karma-spec-reporter": "^0.0.32",
     "karma-verbose-reporter": "^0.0.6",
-    "karma-webpack": "^3",
+    "karma-webpack": "necessary until https://github.com/ryanclark/karma-webpack/pull/449 is merged",
+    "karma-webpack": "instructure/karma-webpack#patch1",
     "lint-staged": "^9",
     "merge-stream": "^2",
     "mockdate": "^2.0.2",
@@ -345,6 +346,8 @@
   "resolutions": {
     "jquery": "https://github.com/instructure/jquery.git#1.7.2-with-AMD-and-CommonJS",
     "graphael": "this is just here so yarn.lock looks the same whether the analytics plugin is checked out or not",
-    "graphael": "https://github.com/instructure/graphael.git"
+    "graphael": "https://github.com/instructure/graphael.git",
+    "babel-plugin-dynamic-import-node": "if we let this upgrade to recent versions, we hit https://github.com/babel/babel/issues/11607",
+    "babel-plugin-dynamic-import-node": "2.3.0"
   }
 }