message: Update CHANGELOG.md for publish
diff: ## Upcoming
  - `apollo`
  - - Support custom frontend and historic parameters for federated service:check
  + - <First `apollo` related entry goes here>
  - `apollo-codegen-flow`
  - <First `apollo-codegen-flow` related entry goes here>
  - `apollo-codegen-scala`
  - <First `apollo-codegen-scala` related entry goes here>
  - `apollo-codegen-swift`
  - - Ensure fields named `self` don't cause compilation errors in the generated code [#1533](https://github.com/apollographql/apollo-tooling/pull/1533)
  - - Preserve leading/trailing underscores on field names [#1533](https://github.com/apollographql/apollo-tooling/pull/1533)
  - - Allow generated code to be compiled without a module umbrella header [#1248](https://github.com/apollographql/apollo-tooling/pull/1248)
  + - <First `apollo-codegen-swift` related entry goes here>
  - `apollo-codegen-typescript`
  - <First `apollo-codegen-typescript` related entry goes here>
  - `apollo-env`
  - `vscode-apollo`
  - <First `vscode-apollo` related entry goes here>
  +## `apollo@2.19.1`
  +
  +- `apollo@2.19.1`
  + - Support custom frontend and historic parameters for federated service:check
  +- `apollo-codegen-swift@0.35.10`
  + - Ensure fields named `self` don't cause compilation errors in the generated code [#1533](https://github.com/apollographql/apollo-tooling/pull/1533)
  + - Preserve leading/trailing underscores on field names [#1533](https://github.com/apollographql/apollo-tooling/pull/1533)
  + - Allow generated code to be compiled without a module umbrella header [#1248](https://github.com/apollographql/apollo-tooling/pull/1248)
  +
  ## `apollo@2.19.0`
  - `apollo@2.19.0`
  