feat(bash): add additional queries

* function definition and function body
* array
* subscript (array index)
* arithmetic expression

queries/bash/rainbow-delimiters.scm

@@ -15,3 +15,23 @@
 (subshell
  "(" @delimiter
  ")" @delimiter @sentinel) @container
+
+(array
+ "(" @delimiter
+ ")" @delimiter @sentinel) @container
+
+(function_definition
+ "(" @delimiter
+ ")" @delimiter @sentinel) @container
+
+(arithmetic_expansion
+ "$((" @delimiter
+ "))" @delimiter @sentinel) @container
+
+(compound_statement
+ "{" @delimiter
+ "}" @delimiter @sentinel) @container
+
+(subscript
+ "[" @delimiter
+ "]" @delimiter @sentinel) @container

test/highlight/bash/regular.sh

@@ -18,3 +18,13 @@ fi
 
 # Sub-shells
 (true; false; (true; true; (false; true)))
+
+person() {
+	array=(
+		[Alice]="$((2 ^ 10))"
+		[Bob]=2048
+	)
+	echo "${array[$1]}"
+}
+
+person "Alice"