🩹 [Patch]: Add tests for PublicIP (#6)

## Description

- Add tests for PublicIP

## Type of change

<!-- Use the check-boxes [x] on the options that are relevant. -->

- [ ] 📖 [Docs]
- [ ] 🪲 [Fix]
- [x] 🩹 [Patch]
- [ ] ⚠️ [Security fix]
- [ ] 🚀 [Feature]
- [ ] 🌟 [Breaking change]

## Checklist

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- [x] I have performed a self-review of my own code
- [x] I have commented my code, particularly in hard-to-understand areas

tests/PublicIP.Tests.ps1

@@ -0,0 +1,11 @@
+Describe 'PublicIP' {
+    Context 'Module' {
+        It 'The module should be available' {
+            Get-Module -Name 'PublicIP' -ListAvailable | Should -Not -BeNullOrEmpty
+            Write-Verbose (Get-Module -Name 'PublicIP' -ListAvailable | Out-String) -Verbose
+        }
+        It 'The module should be imported' {
+            { Import-Module -Name 'PublicIP' } | Should -Not -Throw
+        }
+    }
+}