patch 8.2.0183: tests fail when the float feature is disabled

Problem:    Tests fail when the float feature is disabled.
Solution:   Skip tests that don't work without float support.
diff --git a/src/testdir/test_vim9_expr.vim b/src/testdir/test_vim9_expr.vim
index 8776e07..e66a559 100644
--- a/src/testdir/test_vim9_expr.vim
+++ b/src/testdir/test_vim9_expr.vim
@@ -19,7 +19,9 @@
 def Test_expr1()
   assert_equal('one', true ? 'one' : 'two')
   assert_equal('one', 1 ? 'one' : 'two')
-  assert_equal('one', 0.1 ? 'one' : 'two')
+  if has('float')
+    assert_equal('one', 0.1 ? 'one' : 'two')
+  endif
   assert_equal('one', 'x' ? 'one' : 'two')
 "  assert_equal('one', 0z1234 ? 'one' : 'two')
   assert_equal('one', [0] ? 'one' : 'two')