Update APL minified file + update test for iota underbar function

Author: Golmote

components/prism-apl.min.js

@@ -1,6 +1,6 @@
 - + × ÷
 ⌈ ⌊ ∣ |
-⍳ ? *
+⍳ ⍸ ? *
 ⍟ ○ ! ⌹
 < ≤ = >
 ≥ ≠ ≡ ≢
@@ -20,7 +20,7 @@
 [
 	["function", "-"], ["function", "+"], ["function", "×"], ["function", "÷"],
 	["function", "⌈"], ["function", "⌊"], ["function", "∣"], ["function", "|"],
-	["function", "⍳"], ["function", "?"], ["function", "*"],
+	["function", "⍳"], ["function", "⍸"], ["function", "?"], ["function", "*"],
 	["function", "⍟"], ["function", "○"], ["function", "!"], ["function", "⌹"],
 	["function", "<"], ["function", "≤"], ["function", "="], ["function", ">"],
 	["function", "≥"], ["function", "≠"], ["function", "≡"], ["function", "≢"],