Numeric comparison assertion methods fail to compare non-integer values

[BernieWhite]

Description of the issue

Numeric comparison assertion methods are unable to compare non-int values such as long and float.

JSON.Net uses Int64 when de-serializing a integer like numeric.

To Reproduce

Rule 'Azure.AppGw.MinInstance' -Type 'Microsoft.Network/applicationGateways' -Tag @{ release = 'GA' } {
    AnyOf {
        # Applies to v1 and v2 without autoscale
        $Assert.GreaterOrEqual($TargetObject, 'Properties.sku.capacity', 2);

        # Applies to v2 with autoscale
        $Assert.GreaterOrEqual($TargetObject, 'Properties.autoscaleConfiguration.minCapacity', 2);
    }
}

Should produce the same result as:

Rule 'Azure.AppGw.MinInstance' -Type 'Microsoft.Network/applicationGateways' -Tag @{ release = 'GA' } {
    AnyOf {
        # Applies to v1 and v2 without autoscale
        $TargetObject.Properties.sku.capacity -ge 2

        # Applies to v2 with autoscale
        $TargetObject.Properties.autoscaleConfiguration.minCapacity -ge 2
    }
}

Module in use and version:

• Module: PSRule
• Version: 0.15.0

Captured output from $PSVersionTable:

Name                           Value
----                           -----
PSVersion                      6.2.4
PSEdition                      Core
GitCommitId                    6.2.4
OS                             Microsoft Windows 10.0.18363
Platform                       Win32NT
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0…}
PSRemotingProtocolVersion      2.3
SerializationVersion           1.1.0.1
WSManStackVersion              3.0