Update package versions (#1479)

Author: dbcp1

qna/demo/package.json

@@ -26,10 +26,10 @@
     "@babel/plugin-transform-runtime": "^7.7.6",
     "@babel/polyfill": "^7.10.4",
     "@babel/preset-env": "^7.7.6",
-    "@tensorflow/tfjs-backend-cpu": "^4.20.0",
-    "@tensorflow/tfjs-backend-webgl": "^4.20.0",
-    "@tensorflow/tfjs-converter": "^4.20.0",
-    "@tensorflow/tfjs-core": "^4.20.0",
+    "@tensorflow/tfjs-backend-cpu": "^4.21.0",
+    "@tensorflow/tfjs-backend-webgl": "^4.21.0",
+    "@tensorflow/tfjs-converter": "^4.21.0",
+    "@tensorflow/tfjs-core": "^4.21.0",
     "babel-preset-env": "^1.7.0",
     "clang-format": "~1.5.0",
     "cross-env": "^7.0.3",

qna/package.json

@@ -13,15 +13,15 @@
     "url": "https://github.com/tensorflow/tfjs-models.git"
   },
   "peerDependencies": {
-    "@tensorflow/tfjs-converter": "^4.20.0",
-    "@tensorflow/tfjs-core": "^4.20.0"
+    "@tensorflow/tfjs-converter": "^4.21.0",
+    "@tensorflow/tfjs-core": "^4.21.0"
   },
   "devDependencies": {
     "@rollup/plugin-node-resolve": "^11.1.0",
     "@rollup/plugin-typescript": "3.1.1",
-    "@tensorflow/tfjs-backend-cpu": "^4.20.0",
-    "@tensorflow/tfjs-converter": "^4.20.0",
-    "@tensorflow/tfjs-core": "^4.20.0",
+    "@tensorflow/tfjs-backend-cpu": "^4.21.0",
+    "@tensorflow/tfjs-converter": "^4.21.0",
+    "@tensorflow/tfjs-core": "^4.21.0",
     "@types/jasmine": "^3.6.3",
     "babel-core": "~6.26.3",
     "babel-plugin-transform-runtime": "~6.23.0",