Generic/UpperCaseConstantName: fix false positive for class instantiation

This commit fixes a false positive that would trigger an error when this
sniff encountered the instantiation of a class named `Define`.

Author: rodrigoprimo

src/Standards/Generic/Sniffs/NamingConventions/UpperCaseConstantNameSniff.php

@@ -87,11 +87,12 @@ public function process(File $phpcsFile, $stackPtr)
             return;
         }
 
-        // Make sure this is not a method call.
+        // Make sure this is not a method call or class instantiation.
         $prev = $phpcsFile->findPrevious(Tokens::$emptyTokens, ($stackPtr - 1), null, true);
         if ($tokens[$prev]['code'] === T_OBJECT_OPERATOR
             || $tokens[$prev]['code'] === T_DOUBLE_COLON
             || $tokens[$prev]['code'] === T_NULLSAFE_OBJECT_OPERATOR
+            || $tokens[$prev]['code'] === T_NEW
         ) {
             return;
         }

src/Standards/Generic/Tests/NamingConventions/UpperCaseConstantNameUnitTest.1.inc

@@ -87,3 +87,5 @@ class MyClass {
 }
 
 $a = ($cond) ? DEFINE : SOMETHING_ELSE;
+
+$object = new Define('value');