### 1.6
- Added support for *https* transport protocol.
+ **Breaking changes**: endpoint configuration gets a new field *epProto*,
see updated examples in the project's *README.md*.
- A new approach to building custom handlers with Cabal Nix-style local builds
and [*ngx-export-distribution*](https://hackage.haskell.org/package/ngx-export-distribution),
see details in the project's *simple/*, *periodic/*, and *prometheus/*
subdirectories.
- Improvement: using a single http manager for all service keys.
### 1.5
- Refactoring of type imports.