test(editorconfig): suggest CA1861 in tests

Since it's often preferable to write test data inline.

Signed-off-by: Kevin Locke <[email protected]>

NLCaseConvert.UnitTests/.editorconfig

@@ -7,6 +7,9 @@
 # Since tests are public methods, only warn when identifiers for private or
 # internal symbols contain underscores.
 dotnet_code_quality.CA1707.api_surface = private, internal
+# Suggest "Avoid constant arrays as arguments"
+# Test data is often written inline for clarity
+dotnet_diagnostic.CA1861.severity = suggestion
 # Disable CA2007: Consider calling ConfigureAwait on the awaited task
 # Calling .ConfigureAwait(false) is contraindicated for xUnit:
 # https://xunit.net/xunit.analyzers/rules/xUnit1030