chore(releasing): use node 16 for testing and remove redundant updati…

…ng note (#19505)

* chore(releasing): use node 16 for testing

* remove note about required cache

RELEASING/Dockerfile.from_local_tarball

@@ -34,7 +34,7 @@ RUN apt-get install -y build-essential libssl-dev \
 
 # Install nodejs for custom build
 # https://nodejs.org/en/download/package-manager/
-RUN curl -sL https://deb.nodesource.com/setup_12.x | bash - \
+RUN curl -sL https://deb.nodesource.com/setup_16.x | bash - \
     && apt-get install -y nodejs
 
 RUN mkdir -p /home/superset

RELEASING/Dockerfile.from_svn_tarball

@@ -34,7 +34,7 @@ RUN apt-get install -y build-essential libssl-dev \
 
 # Install nodejs for custom build
 # https://nodejs.org/en/download/package-manager/
-RUN curl -sL https://deb.nodesource.com/setup_12.x | bash - \
+RUN curl -sL https://deb.nodesource.com/setup_16.x | bash - \
     && apt-get install -y nodejs
 
 RUN mkdir -p /home/superset

UPDATING.md

@@ -39,7 +39,6 @@ assists people when migrating to a new version.
 - [19231](https://github.com/apache/superset/pull/19231): The `ENABLE_REACT_CRUD_VIEWS` feature flag has been removed (permanently enabled). Any deployments which had set this flag to false will need to verify that the React views support their use case.
 - [17556](https://github.com/apache/superset/pull/17556): Bumps mysqlclient from v1 to v2
 - [19113](https://github.com/apache/superset/pull/19113): The `ENABLE_JAVASCRIPT_CONTROLS` setting has moved from app config to a feature flag. Any deployments who overrode this setting will now need to override the feature flag from here onward.
-- [18976](https://github.com/apache/superset/pull/18976): When running the app in debug mode, the app will default to use `SimpleCache` for `FILTER_STATE_CACHE_CONFIG` and `EXPLORE_FORM_DATA_CACHE_CONFIG`. When running in non-debug mode, a cache backend will need to be defined, otherwise the application will fail to start. For installations using Redis or other caching backends, it is recommended to use the same backend for both cache configs.
 - [17881](https://github.com/apache/superset/pull/17881): Previously simple adhoc filter values on string columns were stripped of enclosing single and double quotes. To fully support literal quotes in filters, both single and double quotes will no longer be removed from filter values.
 - [17984](https://github.com/apache/superset/pull/17984): Default Flask SECRET_KEY has changed for security reasons. You should always override with your own secret. Set `PREVIOUS_SECRET_KEY` (ex: PREVIOUS_SECRET_KEY = "\2\1thisismyscretkey\1\2\\e\\y\\y\\h") with your previous key and use `superset re-encrypt-secrets` to rotate you current secrets
 - [15254](https://github.com/apache/superset/pull/15254): Previously `QUERY_COST_FORMATTERS_BY_ENGINE`, `SQL_VALIDATORS_BY_ENGINE` and `SCHEDULED_QUERIES` were expected to be defined in the feature flag dictionary in the `config.py` file. These should now be defined as a top-level config, with the feature flag dictionary being reserved for boolean only values.