Allow extension of module specific context classes

I am uncertain whether this is an api feature we want
to 'advertise', but I do not see a compelling reason
we need to block extending the classes.

bukkit/src/main/java/co/aikar/commands/BukkitCommandCompletionContext.java

@@ -27,7 +27,7 @@ import org.bukkit.command.CommandSender;
 import org.bukkit.entity.Player;
 
 public class BukkitCommandCompletionContext extends CommandCompletionContext<BukkitCommandIssuer> {
-    BukkitCommandCompletionContext(RegisteredCommand command, BukkitCommandIssuer issuer, String input, String config, String[] args) {
+    protected BukkitCommandCompletionContext(RegisteredCommand command, BukkitCommandIssuer issuer, String input, String config, String[] args) {
         super(command, issuer, input, config, args);
     }
 

bukkit/src/main/java/co/aikar/commands/BukkitCommandExecutionContext.java

@@ -30,7 +30,7 @@ import java.util.List;
 import java.util.Map;
 
 public class BukkitCommandExecutionContext extends CommandExecutionContext<BukkitCommandExecutionContext, BukkitCommandIssuer> {
-    BukkitCommandExecutionContext(RegisteredCommand cmd, CommandParameter param, BukkitCommandIssuer sender, List<String> args,
+    protected BukkitCommandExecutionContext(RegisteredCommand cmd, CommandParameter param, BukkitCommandIssuer sender, List<String> args,
                                   int index, Map<String, Object> passedArgs) {
         super(cmd, param, sender, args, index, passedArgs);
     }

bukkit/src/main/java/co/aikar/commands/BukkitConditionContext.java

@@ -27,7 +27,7 @@ import org.bukkit.command.CommandSender;
 import org.bukkit.entity.Player;
 
 public class BukkitConditionContext extends ConditionContext<BukkitCommandIssuer> {
-    BukkitConditionContext(BukkitCommandIssuer issuer, String config) {
+    protected BukkitConditionContext(BukkitCommandIssuer issuer, String config) {
         super(issuer, config);
     }
 

bungee/src/main/java/co/aikar/commands/BungeeCommandCompletionContext.java

@@ -28,7 +28,7 @@ import net.md_5.bungee.api.connection.ProxiedPlayer;
 
 public class BungeeCommandCompletionContext extends CommandCompletionContext<BungeeCommandIssuer> {
 
-    BungeeCommandCompletionContext(RegisteredCommand command, BungeeCommandIssuer issuer, String input, String config, String[] args) {
+    protected BungeeCommandCompletionContext(RegisteredCommand command, BungeeCommandIssuer issuer, String input, String config, String[] args) {
         super(command, issuer, input, config, args);
     }
 

bungee/src/main/java/co/aikar/commands/BungeeCommandExecutionContext.java

@@ -31,7 +31,7 @@ import java.util.Map;
 
 public class BungeeCommandExecutionContext extends CommandExecutionContext<BungeeCommandExecutionContext, BungeeCommandIssuer> {
 
-    BungeeCommandExecutionContext(RegisteredCommand cmd, CommandParameter param, BungeeCommandIssuer sender, List<String> args, int index, Map<String, Object> passedArgs) {
+    protected BungeeCommandExecutionContext(RegisteredCommand cmd, CommandParameter param, BungeeCommandIssuer sender, List<String> args, int index, Map<String, Object> passedArgs) {
         super(cmd, param, sender, args, index, passedArgs);
     }
 

bungee/src/main/java/co/aikar/commands/BungeeConditionContext.java

@@ -4,7 +4,7 @@ import net.md_5.bungee.api.CommandSender;
 import net.md_5.bungee.api.connection.ProxiedPlayer;
 
 public class BungeeConditionContext extends ConditionContext <BungeeCommandIssuer> {
-    BungeeConditionContext(BungeeCommandIssuer issuer, String config) {
+    protected BungeeConditionContext(BungeeCommandIssuer issuer, String config) {
         super(issuer, config);
     }
 

jda5/src/main/java/co/aikar/commands/JDACommandExecutionContext.java

@@ -4,7 +4,7 @@ import java.util.List;
 import java.util.Map;
 
 public class JDACommandExecutionContext extends CommandExecutionContext<JDACommandExecutionContext, JDACommandEvent> {
-    JDACommandExecutionContext(RegisteredCommand cmd, CommandParameter param, JDACommandEvent sender, List<String> args, int index, Map<String, Object> passedArgs) {
+    protected JDACommandExecutionContext(RegisteredCommand cmd, CommandParameter param, JDACommandEvent sender, List<String> args, int index, Map<String, Object> passedArgs) {
         super(cmd, param, sender, args, index, passedArgs);
     }
 }

jda5/src/main/java/co/aikar/commands/JDAConditionContext.java

@@ -1,7 +1,7 @@
 package co.aikar.commands;
 
 public class JDAConditionContext extends ConditionContext<JDACommandEvent> {
-    JDAConditionContext(JDACommandEvent issuer, String config) {
+    protected JDAConditionContext(JDACommandEvent issuer, String config) {
         super(issuer, config);
     }
 }

sponge10/src/main/java/co/aikar/commands/SpongeCommandCompletionContext.java

@@ -28,7 +28,7 @@ import org.spongepowered.api.entity.living.player.Player;
 @SuppressWarnings("WeakerAccess")
 public class SpongeCommandCompletionContext extends CommandCompletionContext<SpongeCommandIssuer> {
 
-    SpongeCommandCompletionContext(final RegisteredCommand command, final SpongeCommandIssuer issuer, final String input, final String config, final String[] args) {
+    protected SpongeCommandCompletionContext(final RegisteredCommand command, final SpongeCommandIssuer issuer, final String input, final String config, final String[] args) {
         super(command, issuer, input, config, args);
     }
 

sponge10/src/main/java/co/aikar/commands/SpongeCommandExecutionContext.java

@@ -30,7 +30,7 @@ import java.util.Map;
 
 public class SpongeCommandExecutionContext extends CommandExecutionContext<SpongeCommandExecutionContext, SpongeCommandIssuer> {
 
-    SpongeCommandExecutionContext(RegisteredCommand cmd, CommandParameter param, SpongeCommandIssuer sender, List<String> args,
+    protected SpongeCommandExecutionContext(RegisteredCommand cmd, CommandParameter param, SpongeCommandIssuer sender, List<String> args,
                                   int index, Map<String, Object> passedArgs) {
         super(cmd, param, sender, args, index, passedArgs);
     }

sponge10/src/main/java/co/aikar/commands/SpongeConditionContext.java

@@ -3,7 +3,7 @@ package co.aikar.commands;
 import org.spongepowered.api.entity.living.player.Player;
 
 public class SpongeConditionContext extends ConditionContext <SpongeCommandIssuer> {
-    SpongeConditionContext(SpongeCommandIssuer issuer, String config) {
+    protected SpongeConditionContext(SpongeCommandIssuer issuer, String config) {
         super(issuer, config);
     }
 

velocity/src/main/java/co/aikar/commands/VelocityCommandCompletionContext.java

@@ -28,7 +28,7 @@ import com.velocitypowered.api.proxy.Player;
 
 public class VelocityCommandCompletionContext extends CommandCompletionContext<VelocityCommandIssuer> {
 
-    VelocityCommandCompletionContext(RegisteredCommand command, VelocityCommandIssuer issuer, String input, String config, String[] args) {
+    protected VelocityCommandCompletionContext(RegisteredCommand command, VelocityCommandIssuer issuer, String input, String config, String[] args) {
         super(command, issuer, input, config, args);
     }
 

velocity/src/main/java/co/aikar/commands/VelocityCommandExecutionContext.java

@@ -8,7 +8,7 @@ import com.velocitypowered.api.proxy.Player;
 
 public class VelocityCommandExecutionContext extends CommandExecutionContext<VelocityCommandExecutionContext, VelocityCommandIssuer> {
 
-    VelocityCommandExecutionContext(RegisteredCommand cmd, CommandParameter param, VelocityCommandIssuer sender, List<String> args, int index, Map<String, Object> passedArgs) {
+    protected VelocityCommandExecutionContext(RegisteredCommand cmd, CommandParameter param, VelocityCommandIssuer sender, List<String> args, int index, Map<String, Object> passedArgs) {
         super(cmd, param, sender, args, index, passedArgs);
     }
 

velocity/src/main/java/co/aikar/commands/VelocityConditionContext.java

@@ -4,7 +4,7 @@ import com.velocitypowered.api.command.CommandSource;
 import com.velocitypowered.api.proxy.Player;
 
 public class VelocityConditionContext extends ConditionContext <VelocityCommandIssuer> {
-    VelocityConditionContext(VelocityCommandIssuer issuer, String config) {
+    protected VelocityConditionContext(VelocityCommandIssuer issuer, String config) {
         super(issuer, config);
     }