Fix array/map comparison when they have different sizes/keys

Author: MatheusRich

spec/e2e/operator/equals.lit

@@ -20,6 +20,7 @@ println(0 == "0") # expect: false
 
 # compound types
 println([] == []) # expect: true
+println([1] == []) # expect: false
 println([1, "foo"] == [1, "foo"]) # expect: true
 println([1, "foo"] == ["foo", 1]) # expect: false
 

src/lit/interpreter.cr

@@ -431,11 +431,11 @@ module Lit
 
       if a.is_a?(LitArray)
         return false if !b.is_a?(LitArray)
-        return a.elements.each_with_index.all? { |value, i| equal?(value, b[i], token) }
+        return a.elements.each_with_index.all? { |value, i| equal?(value, b.elements[i]?, token) }
       end
       if a.is_a?(LitMap)
         return false if !b.is_a?(LitMap)
-        return a.elements.each_with_index.all? { |(key, value), i| equal?(value, b.elements[key], token) }
+        return a.elements.each_with_index.all? { |(key, value), i| equal?(value, b.elements[key]?, token) }
       end
 
       if a.is_a?(Instance) && (instance_eq = a.as(Instance).get_method(token.with_lexeme(BINARY_OP_TO_METHOD[:==])))