Bump pest from 2.7.5 to 2.7.9 (#83)

Bumps [pest](https://github.com/pest-parser/pest) from 2.7.5 to 2.7.9.
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/pest-parser/pest/commit/f60b5184e5eb1f6ef3486614bab6ff89f359ed39"><code>f60b518</code></a>
bump version to 2.7.9 (<a
href="https://redirect.github.com/pest-parser/pest/issues/1002">#1002</a>)</li>
<li><a
href="https://github.com/pest-parser/pest/commit/9d252486a019db2d6574ebd042f773527e0c1e41"><code>9d25248</code></a>
Remove unnecessary unsafe functions (<a
href="https://redirect.github.com/pest-parser/pest/issues/998">#998</a>)</li>
<li><a
href="https://github.com/pest-parser/pest/commit/9f9094ec4e10055f0cec3b2c29a8bee0f55b0078"><code>9f9094e</code></a>
feat: support additional parsing error information (rule call stacks and
(un)...</li>
<li><a
href="https://github.com/pest-parser/pest/commit/30c70943f6857a41a0c842cdd64b4d53d96cc810"><code>30c7094</code></a>
fix: do not generate empty docstring for Rule (<a
href="https://redirect.github.com/pest-parser/pest/issues/987">#987</a>)</li>
<li><a
href="https://github.com/pest-parser/pest/commit/28c01cb0832a83c35fb276f0b382b1f57cd079e5"><code>28c01cb</code></a>
fix: adjust tag association in optional and repeat expressions (<a
href="https://redirect.github.com/pest-parser/pest/issues/985">#985</a>)</li>
<li><a
href="https://github.com/pest-parser/pest/commit/57daac4139dd6c513de24cf380a7deb1f53dad92"><code>57daac4</code></a>
feat: add sql grammar with pratt parser and tests (<a
href="https://redirect.github.com/pest-parser/pest/issues/983">#983</a>)</li>
<li><a
href="https://github.com/pest-parser/pest/commit/a0a92fb7ffa58d66fbca10eb6ce7500bde1ada0b"><code>a0a92fb</code></a>
ci: bump toolchain for check (<a
href="https://redirect.github.com/pest-parser/pest/issues/978">#978</a>)</li>
<li><a
href="https://github.com/pest-parser/pest/commit/da27a1637de43139c9f7ac65d91eb0d83d05ab9b"><code>da27a16</code></a>
fix: DebuggerContest::load_XXX accepts impl AsRef&lt;Path&gt; instead of
&amp;PathBuf (...</li>
<li><a
href="https://github.com/pest-parser/pest/commit/99aad5cdf21c599489b5732747e652f02ca3efde"><code>99aad5c</code></a>
bump toolchain to be able to install cargo-msrv (<a
href="https://redirect.github.com/pest-parser/pest/issues/973">#973</a>)</li>
<li><a
href="https://github.com/pest-parser/pest/commit/8331dba0201bbbe957e1e647e82357bea837eb72"><code>8331dba</code></a>
bump version to 2.7.7 (<a
href="https://redirect.github.com/pest-parser/pest/issues/970">#970</a>)</li>
<li>Additional commits viewable in <a
href="https://github.com/pest-parser/pest/compare/v2.7.5...v2.7.9">compare
view</a></li>
</ul>
</details>
<br />


[![Dependabot compatibility
score](https://dependabot-badges.githubapp.com/badges/compatibility_score?dependency-name=pest&package-manager=cargo&previous-version=2.7.5&new-version=2.7.9)](https://docs.github.com/en/github/managing-security-vulnerabilities/about-dependabot-security-updates#about-compatibility-scores)

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 show <dependency name> ignore conditions` will show all
of the ignore conditions of the specified dependency
- `@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)


</details>

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>