allow array parameters to all the functions where it makes sense

Author: JohnBrinkman

README.md

@@ -46,7 +46,7 @@ Given:
 Visit the [Playground](https://opensource.adobe.com/json-formula/dist/index.html)
 
 # Documentation
-Specification / Reference: [HTML](https://opensource.adobe.com/json-formula/doc/output/json-formula-specification-1.1.0.html) / [PDF](https://opensource.adobe.com/json-formula/doc/output/json-formula-specification-1.1.0.pdf)
+Specification / Reference: [HTML](https://opensource.adobe.com/json-formula/doc/output/json-formula-specification-1.1.2.html) / [PDF](https://opensource.adobe.com/json-formula/doc/output/json-formula-specification-1.1.2.pdf)
 
 [JavaScript API](./doc/output/JSDOCS.md)
 

doc/spec.adoc

@@ -91,7 +91,7 @@ In all cases except ordering comparison, if the coercion is not possible, a `Typ
     eval([1,2,3] ~ 4, {}) -> [1,2,3,4]
     eval(123 < "124", {}) -> true
     eval("23" > 111, {}) -> false
-    eval(abs("-2"), {}) -> 2
+    eval(avg(["2", "3", "4"]), {}) -> 3
     eval(1 == "1", {}) -> false
 ----