Feat: Add Request Alerts and upload file (#43)

Fixes to Upload data type, as well as adding in of two error alerts for upload and fetch.
Co-authored-by: Ben Warzeski <bwarzeski@edx.org>
Co-authored-by: Raymond Zhou <56318341+rayzhou-bit@users.noreply.github.com

package.json

@@ -34,7 +34,7 @@
   "homepage": "https://github.com/edx/frontend-lib-content-components#readme",
   "devDependencies": {
     "@edx/frontend-build": "9.1.1",
-    "@edx/frontend-platform": "1.15.2",
+    "@edx/frontend-platform": "1.15.5",
     "@edx/paragon": "19.6.0",
     "@testing-library/dom": "^8.11.1",
     "@testing-library/react": "12.1.1",
@@ -73,7 +73,7 @@
   },
   "peerDependencies": {
     "@edx/paragon": ">= 7.0.0 < 20.0.0",
-    "@edx/frontend-platform": "1.14.0",
+    "@edx/frontend-platform": ">1.15.0",
     "prop-types": "^15.5.10",
     "react": "^16.14.0",
     "react-dom": "^16.14.0"