Update webpki-roots requirement from 0.26 to 1.0

Updates the requirements on [webpki-roots](https://github.com/rustls/webpki-roots) to permit the latest version. <details> <summary>Release notes</summary> <p><em>Sourced from <a href="https://github.com/rustls/webpki-roots/releases">webpki-roots's releases</a>.</em></p> <blockquote> <h2>1.0.0</h2> <p>After 51 releases over about nine years, this is the first stable release of the <a href="https://crates.io/crates/webpki-roots"><code>webpki-roots</code></a> and <a href="https://crates.io/crates/webpki-root-certs"><code>webpki-root-certs</code></a> crates.</p> <p>The 1.0.0 release is functionally equal to the 0.26.10 release. We will make a 0.26.11 release that uses 1.0.0 using the semver trick.</p> <h2>What's Changed</h2> <ul> <li>Refine CI workflow triggers by <a href="https://github.com/djc"><code>@​djc</code></a> in <a href="https://redirect.github.com/rustls/webpki-roots/pull/97">rustls/webpki-roots#97</a></li> <li>Prepare 1.0.0 by <a href="https://github.com/ctz"><code>@​ctz</code></a> in <a href="https://redirect.github.com/rustls/webpki-roots/pull/98">rustls/webpki-roots#98</a></li> </ul> <p><strong>Full Changelog</strong>: <a href="https://github.com/rustls/webpki-roots/compare/v/0.26.10...v/1.0.0">https://github.com/rustls/webpki-roots/compare/v/0.26.10...v/1.0.0</a></p> </blockquote> </details> <details> <summary>Commits</summary> <ul> <li><a href="https://github.com/rustls/webpki-roots/commit/d37be113f9e08b6b57a3c93492109b0b6d2a4b1f"><code>d37be11</code></a> Declare crates as 1.0.0</li> <li><a href="https://github.com/rustls/webpki-roots/commit/76a8dfd96afac2e3e186047273f12bb58adbb059"><code>76a8dfd</code></a> ci: add cargo-semver-checks job</li> <li><a href="https://github.com/rustls/webpki-roots/commit/f0cbde0b0bdcf9960a415cc5840a02b64276f9d0"><code>f0cbde0</code></a> ci: enable triggering CI workflow manually</li> <li><a href="https://github.com/rustls/webpki-roots/commit/80ac5af80dbc143abcbd12c3c7be39ef549bfb68"><code>80ac5af</code></a> ci: skip push triggers for most branches</li> <li><a href="https://github.com/rustls/webpki-roots/commit/e37165d9958757a6a1a96155c1eaad50cf40d768"><code>e37165d</code></a> webpki-(roots|root-certs): v0.26.9 -&gt; v0.26.10</li> <li><a href="https://github.com/rustls/webpki-roots/commit/4a4e2aa5d6dac384d62cac22ae0c05cc5a2576ed"><code>4a4e2aa</code></a> April CCADB updates:</li> <li><a href="https://github.com/rustls/webpki-roots/commit/82c433e58cc0328869204d6c718eb8df64a6a226"><code>82c433e</code></a> webpki-ccadb: support placeholder absent trust bits</li> <li><a href="https://github.com/rustls/webpki-roots/commit/5b76d00f0444d36ab2e6582661cf543a53db295e"><code>5b76d00</code></a> Address new nightly clippy lints</li> <li><a href="https://github.com/rustls/webpki-roots/commit/7c4a88225cebe1d2d321c52bc4c09469a3fbe6cb"><code>7c4a882</code></a> Move to 2021 edition</li> <li><a href="https://github.com/rustls/webpki-roots/commit/575994bb516f2b1fff0dc6eea37eec76e6ba8888"><code>575994b</code></a> webpki-(roots|root-certs): v0.26.8 -&gt; v0.26.9</li> <li>Additional commits viewable in <a href="https://github.com/rustls/webpki-roots/compare/v/0.26.0...v/1.0.0">compare view</a></li> </ul> </details> <br /> 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>