fix(deps): update module github.com/stretchr/testify to v1.8.4 (#88)

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This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [github.com/stretchr/testify](https://togithub.com/stretchr/testify) |
require | patch | `v1.8.3` -> `v1.8.4` |

---

### Release Notes

<details>
<summary>stretchr/testify</summary>

###
[`v1.8.4`](https://togithub.com/stretchr/testify/compare/v1.8.3...v1.8.4)

[Compare
Source](https://togithub.com/stretchr/testify/compare/v1.8.3...v1.8.4)

</details>

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go.mod

@@ -146,7 +146,7 @@ require (
 	github.com/spf13/afero v1.9.3 // indirect
 	github.com/spf13/cast v1.5.0 // indirect
 	github.com/spf13/jwalterweatherman v1.1.0 // indirect
-	github.com/stretchr/testify v1.8.3
+	github.com/stretchr/testify v1.8.4
 	github.com/subosito/gotenv v1.4.2 // indirect
 	github.com/ugorji/go/codec v1.2.9 // indirect
 	go.opentelemetry.io/otel/exporters/otlp/internal/retry v1.16.0 // indirect

go.sum

@@ -506,8 +506,8 @@ github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/
 github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
 github.com/stretchr/testify v1.8.1/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4=
-github.com/stretchr/testify v1.8.3 h1:RP3t2pwF7cMEbC1dqtB6poj3niw/9gnV4Cjg5oW5gtY=
-github.com/stretchr/testify v1.8.3/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
+github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
+github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
 github.com/subosito/gotenv v1.4.2 h1:X1TuBLAMDFbaTAChgCBLu3DU3UPyELpnF2jjJ2cz/S8=
 github.com/subosito/gotenv v1.4.2/go.mod h1:ayKnFf/c6rvx/2iiLrJUk1e6plDbT3edrFNGqEflhK0=
 github.com/testcontainers/testcontainers-go v0.20.1 h1:mK15UPJ8c5P+NsQKmkqzs/jMdJt6JMs5vlw2y4j92c0=