Cleaned up JSON (#1596)

This PR removes useless flags (because JS is case sensitive, so is JSON)
and adds one to number to make the pattern more compact.

Author: RunDevelopment

components/prism-json.js

@@ -1,18 +1,18 @@
 Prism.languages.json = {
 	'comment': /\/\/.*|\/\*[\s\S]*?(?:\*\/|$)/,
 	'property': {
-		pattern: /"(?:\\.|[^\\"\r\n])*"(?=\s*:)/i,
+		pattern: /"(?:\\.|[^\\"\r\n])*"(?=\s*:)/,
 		greedy: true
 	},
 	'string': {
 		pattern: /"(?:\\.|[^\\"\r\n])*"(?!\s*:)/,
 		greedy: true
 	},
-	'number': /-?\d+\.?\d*([Ee][+-]?\d+)?/,
+	'number': /-?\d+\.?\d*(e[+-]?\d+)?/i,
 	'punctuation': /[{}[\],]/,
-	'operator': /:/g,
-	'boolean': /\b(?:true|false)\b/i,
-	'null': /\bnull\b/i
+	'operator': /:/,
+	'boolean': /\b(?:true|false)\b/,
+	'null': /\bnull\b/
 };
 
 Prism.languages.jsonp = Prism.languages.json;