Merge pull request salsa-rs#543 from MichaReiser/input-builder

Introduce `Input::builder` API

Fix clippy warnings

Publish v0.16.1

- salsa-rs#259 salsa's `debug!` logs now include query dependencies in
  human-readable format, which helps with debugging unwanted
  dependencies.

Merge pull request salsa-rs#251 from matklad/16

Publish v0.16.0

Pubish 0.15.3

Release v0.15.2

* salsa-rs#243, better error message from proc macro
* salsa-rs#240, purge method for cleaning the database completely

Release v0.15.1

- replace `rand` with `oorandom` (salsa-rs#241)

Release v0.15.0

The single (but big) change is Dynamic Database RFC implementation:

salsa-rs#231

release v0.14.4

Significantly amount of memory used to store dependency information