Add pull alias in EffPush (#8230)

Author: CJH3139

src/main/java/ch/njol/skript/effects/EffPush.java

@@ -30,7 +30,7 @@ public class EffPush extends Effect {
 
 	static {
 		Skript.registerEffect(EffPush.class,
-			"(push|thrust) %entities% [along] %direction% [(at|with) [a] (speed|velocity|force) [of] %-number%]",
+			"(push|thrust|pull) %entities% [along] %direction% [(at|with) [a] (speed|velocity|force) [of] %-number%]",
 			"(push|thrust|pull) %entities% (towards|away:away from) %location% [(at|with) [a] (speed|velocity|force) [of] %-number%]");
 	}
 

src/test/skript/tests/syntaxes/effects/EffPush.sk

@@ -21,4 +21,8 @@ test "pushing and pulling":
 	push {_e} along vector(-2,-1,-1)
 	assert {_e}'s velocity is vector(0,0,0) with "pig's velocity after push was wrong"
 
+	set the velocity of {_e} to vector(0,0,0)
+	pull {_e} along vector(1,2,3)
+	assert {_e}'s velocity is vector(1,2,3) with "pig's velocity after pull was wrong"
+
 	delete entity within {_e}