build(deps): Bump github.com/golang/protobuf from 1.4.2 to 1.4.3 (#5506)

Bumps [github.com/golang/protobuf](https://github.com/golang/protobuf) from 1.4.2 to 1.4.3.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a href="https://github.com/golang/protobuf/releases">github.com/golang/protobuf's releases</a>.</em></p>
<blockquote>
<h2>v1.4.3</h2>
<p>Notable changes:</p>
<p>(<a href="https://github-redirect.dependabot.com/golang/protobuf/issues/1221">#1221</a>) jsonpb: Fix marshaling of Duration
(<a href="https://github-redirect.dependabot.com/golang/protobuf/issues/1210">#1210</a>) proto: convert integer to rune before converting to string</p>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="4846b58453"><code>4846b58</code></a> jsonpb: Fix marshaling of Duration (<a href="https://github-redirect.dependabot.com/golang/protobuf/issues/1221">#1221</a>)</li>
<li><a href="91c84e0db1"><code>91c84e0</code></a> travis.yml: update tested versions of Go (<a href="https://github-redirect.dependabot.com/golang/protobuf/issues/1211">#1211</a>)</li>
<li><a href="3860b2764f"><code>3860b27</code></a> proto: convert integer to rune before converting to string (<a href="https://github-redirect.dependabot.com/golang/protobuf/issues/1210">#1210</a>)</li>
<li>See full diff in <a href="https://github.com/golang/protobuf/compare/v1.4.2...v1.4.3">compare view</a></li>
</ul>
</details>
<br />


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</details>

go.mod

@@ -14,11 +14,10 @@ require (
 	github.com/go-kit/kit v0.10.0
 	github.com/go-logfmt/logfmt v0.5.0
 	github.com/gogo/protobuf v1.3.1
-	github.com/golang/protobuf v1.4.2
+	github.com/golang/protobuf v1.4.3
 	github.com/gorilla/websocket v1.4.2
 	github.com/gtank/merlin v0.1.1
 	github.com/libp2p/go-buffer-pool v0.0.2
-	github.com/magiconair/properties v1.8.1
 	github.com/minio/highwayhash v1.0.1
 	github.com/pkg/errors v0.9.1
 	github.com/prometheus/client_golang v1.7.1

go.sum

@@ -188,6 +188,8 @@ github.com/golang/protobuf v1.4.0/go.mod h1:jodUvKwWbYaEsadDk5Fwe5c77LiNKVO9IDvq
 github.com/golang/protobuf v1.4.1/go.mod h1:U8fpvMrcmy5pZrNK1lt4xCsGvpyWQ/VVv6QDs8UjoX8=
 github.com/golang/protobuf v1.4.2 h1:+Z5KGCizgyZCbGh1KZqA0fcLLkwbsjIzS4aV2v7wJX0=
 github.com/golang/protobuf v1.4.2/go.mod h1:oDoupMAO8OvCJWAcko0GGGIgR6R6ocIYbsSw735rRwI=
+github.com/golang/protobuf v1.4.3 h1:JjCZWpVbqXDqFVmTfYWEVTMIYrL/NPdPSCHPJ0T/raM=
+github.com/golang/protobuf v1.4.3/go.mod h1:oDoupMAO8OvCJWAcko0GGGIgR6R6ocIYbsSw735rRwI=
 github.com/golang/snappy v0.0.0-20180518054509-2e65f85255db/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
 github.com/golang/snappy v0.0.1 h1:Qgr9rKW7uDUkrbSmQeiDsGa8SjGyCOGtuasMWwvp2P4=
 github.com/golang/snappy v0.0.1/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=