Merge #21

21: Bump num-bigint from 0.2.2 to 0.2.3 r=tommilligan a=dependabot-preview[bot]

Bumps [num-bigint](https://github.com/rust-num/num-bigint) from 0.2.2 to 0.2.3.
<details>
<summary>Changelog</summary>

*Sourced from [num-bigint's changelog](https://github.com/rust-num/num-bigint/blob/master/RELEASES.md).*

> # Release 0.2.3 (2019-09-03)
> 
> - [`Pow` is now implemented for `BigUint` exponents][77].
> - [The optional `quickcheck` feature enables implementations of `Arbitrary`][99].
> - See the [full comparison][compare-0.2.3] for performance enhancements and more!
> 
> [77]: [rust-num/num-bigint#77](https://github-redirect.dependabot.com/rust-num/num-bigint/pull/77)
> [99]: [rust-num/num-bigint#99](https://github-redirect.dependabot.com/rust-num/num-bigint/pull/99)
> [compare-0.2.3]: rust-num/num-bigint@num-bigint-0.2.2...num-bigint-0.2.3
> 
> **Contributors**: [@&#8203;cuviper](https://github.com/cuviper), [@&#8203;lcnr](https://github.com/lcnr), [@&#8203;maxbla](https://github.com/maxbla), [@&#8203;mikelodder7](https://github.com/mikelodder7), [@&#8203;mikong](https://github.com/mikong),
> [@&#8203;TheLetterTheta](https://github.com/TheLetterTheta), [@&#8203;tspiteri](https://github.com/tspiteri), [@&#8203;XAMPPRocky](https://github.com/XAMPPRocky), [@&#8203;youknowone](https://github.com/youknowone)
</details>
<details>
<summary>Commits</summary>

- [`7417458`](rust-num/num-bigint@7417458) Merge [#108](https://github-redirect.dependabot.com/rust-num/num-bigint/issues/108)
- [`e86e14b`](rust-num/num-bigint@e86e14b) Release 0.2.3
- [`f13f1e9`](rust-num/num-bigint@f13f1e9) Allow bare_trait_objects for now
- [`50f6197`](rust-num/num-bigint@50f6197) Use `?` instead of deprecated `try!`
- [`a473fe3`](rust-num/num-bigint@a473fe3) Merge [#107](https://github-redirect.dependabot.com/rust-num/num-bigint/issues/107)
- [`9430db3`](rust-num/num-bigint@9430db3) fix(bigint): Remove unused check for BigInt lcm
- [`e247980`](rust-num/num-bigint@e247980) fix(lcm): Also added fix for BigUInt
- [`500d250`](rust-num/num-bigint@500d250) fix(lcm): lcm(0,0) = 0
- [`3e34876`](rust-num/num-bigint@3e34876) Merge [#99](https://github-redirect.dependabot.com/rust-num/num-bigint/issues/99)
- [`edc5428`](rust-num/num-bigint@edc5428) switch quickchecks to using operations by reference
- Additional commits viewable in [compare view](rust-num/num-bigint@num-bigint-0.2.2...num-bigint-0.2.3)
</details>
<br />

[![Dependabot compatibility score](https://api.dependabot.com/badges/compatibility_score?dependency-name=num-bigint&package-manager=cargo&previous-version=0.2.2&new-version=0.2.3)](https://dependabot.com/compatibility-score.html?dependency-name=num-bigint&package-manager=cargo&previous-version=0.2.2&new-version=0.2.3)

Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting `@dependabot rebase`.

[//]: # (dependabot-automerge-start)
[//]: # (dependabot-automerge-end)

---

<details>
<summary>Dependabot commands and options</summary>
<br />

You can trigger Dependabot actions by commenting on this PR:
- `@dependabot rebase` will rebase this PR
- `@dependabot recreate` will recreate this PR, overwriting any edits that have been made to it
- `@dependabot merge` will merge this PR after your CI passes on it
- `@dependabot squash and merge` will squash and merge this PR after your CI passes on it
- `@dependabot cancel merge` will cancel a previously requested merge and block automerging
- `@dependabot reopen` will reopen this PR if it is closed
- `@dependabot close` will close this PR and stop Dependabot recreating it. You can achieve the same result by closing it manually
- `@dependabot ignore this major version` will close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself)
- `@dependabot ignore this minor version` will close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself)
- `@dependabot ignore this dependency` will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself)
- `@dependabot use these labels` will set the current labels as the default for future PRs for this repo and language
- `@dependabot use these reviewers` will set the current reviewers as the default for future PRs for this repo and language
- `@dependabot use these assignees` will set the current assignees as the default for future PRs for this repo and language
- `@dependabot use this milestone` will set the current milestone as the default for future PRs for this repo and language
- `@dependabot badge me` will comment on this PR with code to add a "Dependabot enabled" badge to your readme

Additionally, you can set the following in your Dependabot [dashboard](https://app.dependabot.com):
- Update frequency (including time of day and day of week)
- Automerge options (never/patch/minor, and dev/runtime dependencies)
- Pull request limits (per update run and/or open at any time)
- Out-of-range updates (receive only lockfile updates, if desired)
- Security updates (receive only security updates, if desired)

Finally, you can contact us by mentioning @dependabot.

</details>

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

Cargo.toml

@@ -9,7 +9,7 @@ cairo-rs = { version = "0.7.1", features = ["png"] }
 clap = "^2.33.0"
 env_logger = "^0.6.2"
 log = "^0.4.8"
-num-bigint = "^0.2.2"
+num-bigint = "^0.2.3"
 num-traits = "^0.2.8"
 num_cpus = "^1.10.1"
 png = "0.15.0"