drop support of Perl 5.12

Author: shogo82148

.github/workflows/test.yml

@@ -65,7 +65,6 @@ jobs:
               '5.18',
               '5.16',
               '5.14',
-              '5.12',
           ]
           redis = [
               '7.0',

cpanfile

@@ -1,4 +1,4 @@
-requires 'perl', '5.012000';
+requires 'perl', '5.014000';
 requires 'Try::Tiny';
 requires 'Time::HiRes' => '>=1.77';