Added rules for true? and false?

Instead of (= true ?x), consider (true? ?x). Same for false?

src/kibit/rules/equality.clj

@@ -17,6 +17,10 @@
   [(< ?x 0) (neg? ?x)]
   [(> 0 ?x) (neg? ?x)]
 
+  ;; true? false?
+  [(= true ?x) (true? ?x)]
+  [(= false ?x) (false? ?x)]
+
   ; nil?
   [(= ?x nil) (nil? ?x)]
   [(= nil ?x) (nil? ?x)])

test/kibit/test/equality.clj

@@ -14,6 +14,8 @@
     '(pos? x) '(> x 0)
     '(neg? x) '(< x 0)
     '(neg? x) '(> 0 x)
+    '(true? x) '(= true x)
+    '(false? x) '(= false x)
     '(nil? x) '(= nil x)
     '(nil? x) '(= x nil)))