0.0.3

• BREAKING CHANGE: Make ExpressOptionsValidator<TOptions> internal and sealed.
• Pre-allocate error list capacity with result.Errors.Count to avoid resizing in ExpressOptionsValidator<TOptions>.
• Simplify ValidateOptionsResult.Fail failure factory by removing one parameter from the factory function.
• Fix incorrect version number in ExpressValidator.Extensions.ValidationOnStart.csproj.
• Update to ExpressValidator 0.15.0.
• Update Microsoft nuget packages.
• Update libraries used in tests.
• Package 0.0.3.
• Add CHANGELOG.md.