Merge 3.x_dev branch (tensorflow#4537)

BREAKING
FEATURE

Summary of breaking changes

  Removal of *strict variants of ops
  Remove deprecated tensor.depthwiseConv2D (use tensor.depthwiseConv2d)
  Remove dilations param from maxPool3d and avgPool3d
  Remove default registration of chaining api from core
  Remove default registration of gradients from core

Other Changes

  Add .fesm bundles to npm package
  Rename custom-bundle tool to custom-module

Internal changes
  refactor runKernel/runKernelFunc to remove legacy code after modularization of all kernels

Author: tafsiri

e2e/custom_bundle/blazeface/app.js renamed to e2e/custom_module/blazeface/app.js

@@ -5,7 +5,7 @@
   "main": "app.js",
   "scripts": {
     "test": "echo \"Error: no test specified\" && exit 1",
-    "make-custom-tfjs-modules": "node ./node_modules/@tensorflow/tfjs/dist/tools/custom_bundle/cli.js --config app_tfjs_config.json",
+    "make-custom-tfjs-modules": "node ./node_modules/@tensorflow/tfjs/dist/tools/custom_module/cli.js --config app_tfjs_config.json",
     "rollup:full": "rollup -c",
     "rollup:custom": "rollup -c --useCustomTfjs",
     "webpack:full": "webpack",