Added documentation for MaximumVersion key used with #Requires (#4772)

* Added MaximumVersion key to about_Requires.md

Documented use of the MaximumVersion key for specifying the maximum allowable version of a module.

* Added MaximumVersion key to v6 about_Requires.md

Documented use of the MaximumVersion key for specifying the maximum allowable version of a module.

* Added MaximumVersion key to v7 about_Requires.md

Documented use of the MaximumVersion key for specifying the maximum allowable version of a module.

* Update about_Requires.md

Amend quantity of required hashtable keys that can be used in addition to ModuleName

* Update about_Requires.md

Amend quantity of required hashtable keys that can be used in addition to ModuleName

* Update about_Requires.md

Amend quantity of required hashtable keys that can be used in addition to ModuleName

* Update about_Requires.md

* Update about_Requires.md

* Update about_Requires.md

Author: markroloff

reference/5.1/Microsoft.PowerShell.Core/About/about_Requires.md

@@ -93,13 +93,15 @@ following keys.
 
 - `ModuleName` - **Required** Specifies the module name.
 - `GUID` - **Optional** Specifies the GUID of the module.
-- It is also **Required** to specify one of the two below keys. These keys
+- It is also **Required** to specify one of the three below keys. These keys
   cannot be used together.
   - `ModuleVersion` - Specifies a minimum acceptable version of the module.
   - `RequiredVersion` - Specifies an exact, required version of the module.
+  - `MaximumVersion` - Specifies the maximum acceptable version of the module.
 
 > [!NOTE]
 > `RequiredVersion` was added in Windows PowerShell 5.0.
+> `MaximumVersion` was added in Windows PowerShell 5.1.
 
 For example:
 
@@ -115,6 +117,12 @@ Requires that `Hyper-V` (**only** version `1.1`) is installed.
 #Requires -Modules @{ ModuleName="Hyper-V"; RequiredVersion="1.1" }
 ```
 
+Requires that `Hyper-V` (version `1.1` or lesser) is installed.
+
+```powershell
+#Requires -Modules @{ ModuleName="Hyper-V"; MaximumVersion="1.1" }
+```
+
 Requires that any version of `PSScheduledJob` and `PSWorkflow`, is installed.
 
 ```powershell
@@ -205,4 +213,4 @@ Param
 
 [about_PSSnapins](about_PSSnapins.md)
 
-[Get-PSSnapin](../Get-PSSnapin.md)
+[Get-PSSnapin](../Get-PSSnapin.md)

reference/6/Microsoft.PowerShell.Core/About/about_Requires.md

@@ -93,13 +93,15 @@ following keys.
 
 - `ModuleName` - **Required** Specifies the module name.
 - `GUID` - **Optional** Specifies the GUID of the module.
-- It is also **Required** to specify one of the two below keys. These keys
+- It is also **Required** to specify one of the three below keys. These keys
   cannot be used together.
   - `ModuleVersion` - Specifies a minimum acceptable version of the module.
   - `RequiredVersion` - Specifies an exact, required version of the module.
+  - `MaximumVersion` - Specifies the maximum acceptable version of the module.
 
 > [!NOTE]
 > `RequiredVersion` was added in Windows PowerShell 5.0.
+> `MaximumVersion` was added in Windows PowerShell 5.1.
 
 For example:
 
@@ -115,6 +117,12 @@ Require that `AzureRM.Netcore` (**only** version `0.12.0`) is installed.
 #Requires -Modules @{ ModuleName="AzureRM.Netcore"; RequiredVersion="0.12.0" }
 ```
 
+Requires that `AzureRM.Netcore` (version `0.12.0` or lesser) is installed.
+
+```powershell
+#Requires -Modules @{ ModuleName="AzureRM.Netcore"; MaximumVersion="0.12.0" }
+```
+
 Require that any version of `AzureRM.Netcore` and `PowerShellGet` is installed.
 
 ```powershell

reference/7/Microsoft.PowerShell.Core/About/about_Requires.md

@@ -93,13 +93,15 @@ following keys.
 
 - `ModuleName` - **Required** Specifies the module name.
 - `GUID` - **Optional** Specifies the GUID of the module.
-- It is also **Required** to specify one of the two below keys. These keys
+- It is also **Required** to specify one of the three below keys. These keys
   cannot be used together.
   - `ModuleVersion` - Specifies a minimum acceptable version of the module.
   - `RequiredVersion` - Specifies an exact, required version of the module.
+  - `MaximumVersion` - Specifies the maximum acceptable version of the module.
 
 > [!NOTE]
 > `RequiredVersion` was added in Windows PowerShell 5.0.
+> `MaximumVersion` was added in Windows PowerShell 5.1.
 
 For example:
 
@@ -115,6 +117,12 @@ Require that `AzureRM.Netcore` (**only** version `0.12.0`) is installed.
 #Requires -Modules @{ ModuleName="AzureRM.Netcore"; RequiredVersion="0.12.0" }
 ```
 
+Requires that `AzureRM.Netcore` (version `0.12.0` or lesser) is installed.
+
+```powershell
+#Requires -Modules @{ ModuleName="AzureRM.Netcore"; MaximumVersion="0.12.0" }
+```
+
 Require that any version of `AzureRM.Netcore` and `PowerShellGet` is installed.
 
 ```powershell