Update .editorconfig

Author: JimBobSquarePants

.editorconfig

@@ -68,6 +68,15 @@ end_of_line = lf
 [Makefile]
 indent_style = tab
 
+##########################################
+# Default .NET Code Style Severities
+# https://docs.microsoft.com/dotnet/fundamentals/code-analysis/configuration-options#scope
+##########################################
+
+[*.{cs,csx,cake,vb,vbx}]
+# Default Severity for all .NET Code Style rules below
+dotnet_analyzer_diagnostic.category-style.severity = warning
+
 ##########################################
 # Language Rules
 # https://docs.microsoft.com/dotnet/fundamentals/code-analysis/style-rules/language-rules