Various fixes

Author: GillesTourreau

README.md

@@ -13,7 +13,7 @@ To download and install the library to your Visual Studio unit test projects use
 Install-Package PosInformatique.Moq.Analyzers
 ```
 
-The analyzers are automatically added and activated with their default warning levels.
+The analyzer is automatically added and activated with their default severity levels.
 
 ## Rules
 

src/Moq.Analyzers/Moq.Analyzers.csproj

@@ -2,7 +2,6 @@
 
   <PropertyGroup>
     <TargetFramework>netstandard2.0</TargetFramework>
-    <IsPackable>false</IsPackable>
     <EnforceExtendedAnalyzerRules>true</EnforceExtendedAnalyzerRules>
 
     <Description>PosInformatique.Moq.Analyzers is a library to verify syntax and code design when writing the unit tests using the Moq library.</Description>