Fix visibility of Validate and Execute(Async) methods of commands

Change it back to public instead of protected. Was probably a bad merge in c2b92ac.

Fixes #73

Author: 0xced

src/Spectre.Console.Cli/AsyncCommand.cs

@@ -11,7 +11,7 @@ public abstract class AsyncCommand : ICommand<EmptyCommandSettings>
     /// <param name="context">The command context.</param>
     /// <param name="cancellationToken">A <see cref="CancellationToken"/> that can be used to abort the command.</param>
     /// <returns>An integer indicating whether the command executed successfully.</returns>
-    protected abstract Task<int> ExecuteAsync(CommandContext context, CancellationToken cancellationToken);
+    public abstract Task<int> ExecuteAsync(CommandContext context, CancellationToken cancellationToken);
 
     /// <inheritdoc/>
     Task<int> ICommand<EmptyCommandSettings>.ExecuteAsync(CommandContext context, EmptyCommandSettings settings, CancellationToken cancellationToken)

src/Spectre.Console.Cli/AsyncCommandOfT.cs

@@ -13,7 +13,7 @@ public abstract class AsyncCommand<TSettings> : ICommand<TSettings>
     /// <param name="context">The command context.</param>
     /// <param name="settings">The settings.</param>
     /// <returns>The validation result.</returns>
-    protected virtual ValidationResult Validate(CommandContext context, TSettings settings)
+    public virtual ValidationResult Validate(CommandContext context, TSettings settings)
     {
         return ValidationResult.Success();
     }
@@ -25,7 +25,7 @@ protected virtual ValidationResult Validate(CommandContext context, TSettings se
     /// <param name="settings">The settings.</param>
     /// <param name="cancellationToken">A <see cref="CancellationToken"/> that can be used to abort the command.</param>
     /// <returns>An integer indicating whether or not the command executed successfully.</returns>
-    protected abstract Task<int> ExecuteAsync(CommandContext context, TSettings settings, CancellationToken cancellationToken);
+    public abstract Task<int> ExecuteAsync(CommandContext context, TSettings settings, CancellationToken cancellationToken);
 
     /// <inheritdoc/>
     ValidationResult ICommand.Validate(CommandContext context, CommandSettings settings)

src/Spectre.Console.Cli/Command.cs

@@ -12,7 +12,7 @@ public abstract class Command : ICommand<EmptyCommandSettings>
     /// <param name="context">The command context.</param>
     /// <param name="cancellationToken">A <see cref="CancellationToken"/> that can be used to abort the command.</param>
     /// <returns>An integer indicating whether the command executed successfully.</returns>
-    protected abstract int Execute(CommandContext context, CancellationToken cancellationToken);
+    public abstract int Execute(CommandContext context, CancellationToken cancellationToken);
 
     /// <inheritdoc/>
     Task<int> ICommand<EmptyCommandSettings>.ExecuteAsync(CommandContext context, EmptyCommandSettings settings, CancellationToken cancellationToken)

src/Spectre.Console.Cli/CommandOfT.cs

@@ -14,7 +14,7 @@ public abstract class Command<TSettings> : ICommand<TSettings>
     /// <param name="context">The command context.</param>
     /// <param name="settings">The settings.</param>
     /// <returns>The validation result.</returns>
-    protected virtual ValidationResult Validate(CommandContext context, TSettings settings)
+    public virtual ValidationResult Validate(CommandContext context, TSettings settings)
     {
         return ValidationResult.Success();
     }
@@ -26,7 +26,7 @@ protected virtual ValidationResult Validate(CommandContext context, TSettings se
     /// <param name="settings">The settings.</param>
     /// <param name="cancellationToken">A <see cref="CancellationToken"/> that can be used to abort the command.</param>
     /// <returns>An integer indicating whether the command executed successfully.</returns>
-    protected abstract int Execute(CommandContext context, TSettings settings, CancellationToken cancellationToken);
+    public abstract int Execute(CommandContext context, TSettings settings, CancellationToken cancellationToken);
 
     /// <inheritdoc/>
     ValidationResult ICommand.Validate(CommandContext context, CommandSettings settings)