Bump github.com/containerd/containerd from 1.5.4 to 1.5.18 (#63)

Bumps [github.com/containerd/containerd](https://github.com/containerd/containerd) from 1.5.4 to 1.5.18.
- [Release notes](https://github.com/containerd/containerd/releases)
- [Changelog](https://github.com/containerd/containerd/blob/main/RELEASES.md)
- [Commits](containerd/containerd@v1.5.4...v1.5.18)

---
updated-dependencies:
- dependency-name: github.com/containerd/containerd
  dependency-type: indirect
...

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

go.mod

@@ -3,15 +3,14 @@ module github.com/thought-machine/falco-probes
 go 1.16
 
 require (
-	github.com/containerd/containerd v1.5.4 // indirect
+	github.com/containerd/containerd v1.5.18 // indirect
 	github.com/docker/docker v20.10.7+incompatible
 	github.com/docker/go-connections v0.4.0 // indirect
 	github.com/go-git/go-git/v5 v5.4.2
 	github.com/google/go-github/v37 v37.0.0
 	github.com/jessevdk/go-flags v1.5.0
 	github.com/morikuni/aec v1.0.0 // indirect
 	github.com/rs/zerolog v1.23.0
-	github.com/sirupsen/logrus v1.8.1 // indirect
 	github.com/stretchr/testify v1.7.0
 	golang.org/x/oauth2 v0.0.0-20200107190931-bf48bf16ab8d
 	golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1