fixup! build: explore updating to rxjs 7

.circleci/config.yml

@@ -441,6 +441,8 @@ jobs:
       - run: yarn --cwd aio test-pwa-score-localhost $CI_AIO_MIN_PWA_SCORE
         # Check the bundle sizes.
       - run: yarn --cwd aio payload-size aio-local
+        # Run tests with RxJS v7.
+      - run: yarn --cwd aio add rxjs@7 && yarn --cwd aio test --progress=false --watch=false
 
   test_aio_tools:
     executor: default-executor
@@ -469,6 +471,9 @@ jobs:
         # Since the parallelism is set to "5", there will be five parallel CircleCI containers.
         # with either "0", "1", etc as node index. This can be passed to the "--shard" argument.
       - run: yarn --cwd aio example-e2e --setup --local --cliSpecsConcurrency=5 --shard=${CIRCLE_NODE_INDEX}/${CIRCLE_NODE_TOTAL}
+        # Run tests with RxJS v7.
+      - run: yarn --cwd aio/tools/examples/shared add rxjs@7 && yarn --cwd aio boilerplate:add
+      - run: yarn --cwd aio example-e2e --cliSpecsConcurrency=5 --shard=${CIRCLE_NODE_INDEX}/${CIRCLE_NODE_TOTAL} --exclude={elements,practical-observable-usage,upgrade-{module,phonecat}}
 
   # This job should only be run on PR builds, where `CI_PULL_REQUEST` is not `false`.
   aio_preview:

goldens/size-tracking/aio-payloads.json

@@ -3,7 +3,7 @@
     "master": {
       "uncompressed": {
         "runtime-es2017": 4619,
-        "main-es2017": 456437,
+        "main-es2017": 455488,
         "polyfills-es2017": 55210,
         "styles": 69324,
         "light-theme": 79417,
@@ -15,7 +15,7 @@
     "master": {
       "uncompressed": {
         "runtime-es2017": 4619,
-        "main-es2017": 456576,
+        "main-es2017": 455822,
         "polyfills-es2017": 55348,
         "styles": 69324,
         "light-theme": 79417,