Traces: commas replaced by semi-columns

Standardization of the trace text shape to facilitate textual search into https://github.com/jquery/jquery-migrate/blob/1.x-stable/warnings.md
I arbitrary chose the semi-column as a sentence separator. This is not important, the goal is to be homogeneous between the sources and the documentation, because there is at least one inconsistency with "JQMIGRATE: jQuery.parseJSON is deprecated; use JSON.parse", that I want to fix.

Author: LaurentBarbareau

src/core.js

@@ -62,7 +62,7 @@ for ( findProp in oldFind ) {
 
 // The number of elements contained in the matched element set
 jQuery.fn.size = function() {
-	migrateWarn( "jQuery.fn.size() is deprecated and removed, use the .length property" );
+	migrateWarn( "jQuery.fn.size() is deprecated and removed; use the .length property" );
 	return this.length;
 };
 
@@ -90,10 +90,10 @@ jQuery.isNumeric = function( val ) {
 };
 
 migrateWarnFunc( jQuery, "unique", jQuery.uniqueSort,
-	"jQuery.unique is deprecated, use jQuery.uniqueSort" );
+	"jQuery.unique is deprecated; use jQuery.uniqueSort" );
 
 // Now jQuery.expr.pseudos is the standard incantation
 migrateWarnProp( jQuery.expr, "filters", jQuery.expr.pseudos,
-	"jQuery.expr.filters is deprecated, use jQuery.expr.pseudos" );
+	"jQuery.expr.filters is deprecated; use jQuery.expr.pseudos" );
 migrateWarnProp( jQuery.expr, ":", jQuery.expr.pseudos,
-	"jQuery.expr[':'] is deprecated, use jQuery.expr.pseudos" );
+	"jQuery.expr[':'] is deprecated; use jQuery.expr.pseudos" );