Fixes broken comment highlighting (#90)

Fixes broken comment highlighting when 'requires' word is used in middle of text.

Author: kborowinski

PowerShellSyntax.tmLanguage

@@ -1083,7 +1083,7 @@
 		<key>RequiresDirective</key>
 		<dict>
 			<key>begin</key>
-			<string>(?i:(requires))\s</string>
+			<string>(?<=#)(?i:(requires))\s</string>
 			<key>beginCaptures</key>
 			<dict>
 				<key>0</key>
@@ -1402,4 +1402,4 @@
 	<key>uuid</key>
 	<string>f8f5ffb0-503e-11df-9879-0800200c9a66</string>
 </dict>
-</plist>
+</plist>