docs(CHANGELOG.md): release v0.1.9

Signed-off-by: Raito Bezarius <masterancpp@gmail.com>

* use HTTPS for cache.nixos.org (#246)

* client now use reqwest to obtain HTTPS, content decoding, timeouts and more for free (#247)

* nix-community buildbot CI builds all attributes out of the box (#240)

v0.1.7

Added
------
* improve help message for `nix-locate --type` (issue #204)
* improve error message when `nix-env` is killed by a signal

Fixed
-----
* disable nixpkgs overlays (issue #161)
* fix Nix command suggestions for command-not-found.sh (issue #185)

Changed
-----
* update dependencies

v0.1.6

Added
-----
* support setting `NIX_INDEX_DATABASE` environment variable to set database location (#213), thanks @mmarx
* this version and future versions will be published to https://crates.io, simplifying library usage in other projects

v0.1.5

Fixed
-----
* fix crash when using wildcard pattern with nix-locate (issue #205)

v0.1.4

Fixed
-----
* fix RUSTSEC-2021-0131 (integer overflow in brotli) by migrating away from `brotli2` crate
* fix RUSTSEC-2022-0006 (data race in `thread_local`) by updating `thread_local`
* fix panic when using `--type` CLI (issue #202)

Changed
-------
* update all dependencies in Cargo.lock

version 0.1.3

* flake.nix added to repository, allows directly running nix-index from
  git (#162), thanks @matthewbauer
* support for proxies (#132), thanks @whizsid
* command-not-found.sh suggests new `nix profile` command if
  manifest.json exists (#135), thanks @matthewbauer
* support building project via Nix on Darwin (#175), thanks @BrianHicks
* indexer supports prefix filtering (#177), rhanks @virchau13
* command-line option to specify system for which to build the index
  (#183), thanks @usertam
* nix-channel-index: new command to build a programs.sqlite as currently
  distributed with nix channels (#192), thanks @K900

* command-not-found.sh never accesses undefined variables anymore
  (allows set -u) (#123), thanks @matthewbauer
* support xlibs renamed to xorg in recent nixpkgs (#179), thanks @cole-h

* rust dependencies updated to latest versions, thanks @elude03,
  @berbiche, @Sciecentistguy, @Mic92
* nix-env is now invoked in parallel to query paths (improves
  performance)
* performance improvement: multithread compression (#152), thanks
  @enolan
* performance improvement: reduce compression level from 22 to 19
  (#152), thanks @enolan
* performance improvement: get store paths from nix-env in parallel
  (#152), thanks @enolan

version v0.1.2

fixed:

* don't stop when a single request fails

version v0.1.1

new features:

* forward `--show-trace` argument to nix-index to nix-env (#16)

version v0.1.0

initial release