Failure to discover YAML options file in dotted directory

[BernieWhite]

Description of the issue

When an default options file such as ps-rule.yaml is stored within a directory with a dotted name the file is not found.

For example C:\Temp\Rules.Test.

When a trailing slash is added the options file is correctly discovered. i.e. C:\Temp\Rules.Test\.

This is because the dotted directory name is incorrectly considered a file path instead of a directly path.

To Reproduce

Steps to reproduce the issue:

New-PSRuleOption -Path C:\Temp\Rules.Test;

Expected behaviour

The options file should be discovered in both scenarios.

Error output

Capture any error messages and or verbose messages with -Verbose.

Exception calling "FromFile" with "2" argument(s): "Options file does not exist."
At C:\Users\removed\Documents\PowerShell\Modules\PSRule\0.7.0\PSRule.psm1:727 char:13
+             $Option = [PSRule.Configuration.PSRuleOption]::FromFile($ ...
+             ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo          : NotSpecified: (:) [], MethodInvocationException
+ FullyQualifiedErrorId : FileNotFoundException

SetOptions : Cannot bind argument to parameter 'InputObject' because it is null.
At C:\Users\removed\Documents\PowerShell\Modules\PSRule\0.7.0\PSRule.psm1:755 char:19
+ ...       $Option | SetOptions @optionParams -Verbose:$VerbosePreference;
+                     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo          : InvalidData: (:) [SetOptions], ParameterBindingValidationException
+ FullyQualifiedErrorId : ParameterArgumentValidationErrorNullNotAllowed,SetOptions

Module in use and version:

• Module: PSRule
• Version: 0.7.0

Captured output from $PSVersionTable:

Name                           Value
----                           -----
PSVersion                      6.2.1
PSEdition                      Core
GitCommitId                    6.2.1
OS                             Microsoft Windows 10.0.18362
Platform                       Win32NT
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0…}
PSRemotingProtocolVersion      2.3
SerializationVersion           1.1.0.1
WSManStackVersion              3.0