Return narrowPregMatches into featureToggles schema to fix composer/pcre

Author: ondrejmirtes

conf/config.neon

@@ -94,6 +94,7 @@ parameters:
 		preciseMissingReturn: false
 		validatePregQuote: false
 		noImplicitWildcard: false
+		narrowPregMatches: true
 	fileExtensions:
 		- php
 	checkAdvancedIsset: false

conf/parametersSchema.neon

@@ -89,6 +89,7 @@ parametersSchema:
 		preciseMissingReturn: bool()
 		validatePregQuote: bool()
 		noImplicitWildcard: bool()
+		narrowPregMatches: bool()
 	])
 	fileExtensions: listOf(string())
 	checkAdvancedIsset: bool()