Move away from streamsaver(for now)

package.json

@@ -77,6 +77,7 @@
     "highlight.js": "^10.5.0",
     "html-entities": "^1.4.0",
     "is-ip": "^3.1.0",
+    "jszip": "^3.7.0",
     "katex": "^0.12.0",
     "linkifyjs": "^2.1.9",
     "lodash": "^4.17.20",
@@ -99,10 +100,8 @@
     "resize-observer-polyfill": "^1.5.1",
     "rfc4648": "^1.4.0",
     "sanitize-html": "^2.3.2",
-    "streamsaver": "^2.0.5",
     "tar-js": "^0.3.0",
     "url": "^0.11.0",
-    "web-streams-polyfill": "^3.0.3",
     "what-input": "^5.2.10",
     "zxcvbn": "^4.4.2"
   },
@@ -131,6 +130,7 @@
     "@types/counterpart": "^0.18.1",
     "@types/css-font-loading-module": "^0.0.6",
     "@types/diff-match-patch": "^1.0.32",
+    "@types/file-saver": "^2.0.3",
     "@types/flux": "^3.1.9",
     "@types/jest": "^26.0.20",
     "@types/linkifyjs": "^2.1.3",