Fix extension conflict with const definition (#213)

Author: janedbal

src/UsedSymbolExtractor.php

@@ -426,6 +426,7 @@ private function canBeSymbolName(
             || $tokenAfterName[0] === T_INSTEADOF
             || $tokenAfterName[0] === T_AS
             || $tokenAfterName === ':'
+            || $tokenAfterName === '='
         ) {
             return false;
         }

tests/UsedSymbolExtractorTest.php

@@ -59,6 +59,7 @@ public function provideVariants(): iterable
             [],
             [
                 strtolower('PDO') => SymbolKind::CLASSLIKE,
+                strtolower('SESSION_ID') => SymbolKind::CONSTANT,
             ],
         ];
 

tests/data/not-autoloaded/used-symbols/t-string-issues.php

@@ -10,6 +10,8 @@
 
 class Test
 {
+    public const string SESSION_ID = '...';
+
     use SomeTrait {
         array_filter insteadof array_values;
         array_map as array_walk;