Bump github.com/mailgun/mailgun-go/v4 from 4.12.0 to 4.14.0 (#22)

Bumps
[github.com/mailgun/mailgun-go/v4](https://github.com/mailgun/mailgun-go)
from 4.12.0 to 4.14.0.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/mailgun/mailgun-go/releases">github.com/mailgun/mailgun-go/v4's
releases</a>.</em></p>
<blockquote>
<h2>v4.14.0</h2>
<h2>What's Changed</h2>
<ul>
<li>DE-1307 Add validate’s engagement results by <a
href="https://github.com/vtopc"><code>@​vtopc</code></a> in <a
href="https://redirect.github.com/mailgun/mailgun-go/pull/325">mailgun/mailgun-go#325</a></li>
</ul>
<p><strong>Full Changelog</strong>: <a
href="https://github.com/mailgun/mailgun-go/compare/v4.13.0...v4.14.0">https://github.com/mailgun/mailgun-go/compare/v4.13.0...v4.14.0</a></p>
<h2>v4.13.0</h2>
<h2>What's Changed</h2>
<ul>
<li>DE-1203 subaccounts &amp; X-Mailgun-On-Behalf-Of http header by <a
href="https://github.com/sadbeam"><code>@​sadbeam</code></a> in <a
href="https://redirect.github.com/mailgun/mailgun-go/pull/318">mailgun/mailgun-go#318</a></li>
</ul>
<p><strong>Full Changelog</strong>: <a
href="https://github.com/mailgun/mailgun-go/compare/v4.12.0...v4.13.0">https://github.com/mailgun/mailgun-go/compare/v4.12.0...v4.13.0</a></p>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/mailgun/mailgun-go/commit/ba82fd9e6568ac64ec1f6d62396be3fdaaf256f6"><code>ba82fd9</code></a>
DE-1307 Add validate’s engagement results (<a
href="https://redirect.github.com/mailgun/mailgun-go/issues/325">#325</a>)</li>
<li><a
href="https://github.com/mailgun/mailgun-go/commit/b39a353b13706bad62be2adf254e98b7e1af29bb"><code>b39a353</code></a>
Merge pull request <a
href="https://redirect.github.com/mailgun/mailgun-go/issues/318">#318</a>
from sadbeam/DE-1201/subaccounts-support</li>
<li><a
href="https://github.com/mailgun/mailgun-go/commit/e758192714b6be8a0fb2009bcf1d42ab637e6168"><code>e758192</code></a>
DE-1201 added SetOnBehalfOfSubaccount and RemoveOnBehalfOfSubaccount to
inter...</li>
<li><a
href="https://github.com/mailgun/mailgun-go/commit/88d455cf93e9834b53564a654522ac1995120469"><code>88d455c</code></a>
DE-1201/subaccounts crud and on-behalf-on-header support</li>
<li>See full diff in <a
href="https://github.com/mailgun/mailgun-go/compare/v4.12.0...v4.14.0">compare
view</a></li>
</ul>
</details>
<br />


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go.mod

@@ -6,7 +6,7 @@ require (
 	github.com/emersion/go-smtp v0.21.3
 	github.com/go-ozzo/ozzo-validation/v4 v4.3.0
 	github.com/kelseyhightower/envconfig v1.4.0
-	github.com/mailgun/mailgun-go/v4 v4.12.0
+	github.com/mailgun/mailgun-go/v4 v4.14.0
 	github.com/pkg/errors v0.9.1
 	github.com/prometheus/client_golang v1.19.1
 	github.com/sirupsen/logrus v1.9.3

go.sum

@@ -36,8 +36,8 @@ github.com/kr/pretty v0.3.1 h1:flRD4NNwYAUpkphVc1HcthR4KEIFJ65n8Mw5qdRn3LE=
 github.com/kr/pretty v0.3.1/go.mod h1:hoEshYVHaxMs3cyo3Yncou5ZscifuDolrwPKZanG3xk=
 github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
 github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
-github.com/mailgun/mailgun-go/v4 v4.12.0 h1:TtuQCgqSp4cB6swPxP5VF/u4JeeBIAjTdpuQ+4Usd/w=
-github.com/mailgun/mailgun-go/v4 v4.12.0/go.mod h1:L9s941Lgk7iB3TgywTPz074pK2Ekkg4kgbnAaAyJ2z8=
+github.com/mailgun/mailgun-go/v4 v4.14.0 h1:N9GMNs0XUq5nn3v2TlZHCknF9khSh88MkA1hdRm1o7I=
+github.com/mailgun/mailgun-go/v4 v4.14.0/go.mod h1:L9s941Lgk7iB3TgywTPz074pK2Ekkg4kgbnAaAyJ2z8=
 github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=
 github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd h1:TRLaZ9cD/w8PVh93nsPXa1VrQ6jlwL5oN8l14QlcNfg=
 github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=