ext/pdo_sqlite: fix minimal version for EXPLAIN feature support.

[devnexen]

found out while working on #18853

ref.

[NattyNarwhal]

Fewer differences than before:

--
         ["p1"]=>
         int(0)
         ["p2"]=>
012-     int(14)
012+     int(15)
         ["p3"]=>
         int(0)
         ["p4"]=>
--
         ["p1"]=>
         int(3)
         ["p2"]=>
031-     int(7)
031+     int(8)
         ["p3"]=>
         int(2)
         ["p4"]=>
--
         ["addr"]=>
         int(2)
         ["opcode"]=>
046+     string(7) "Explain"
047+     ["p1"]=>
048+     int(2)
049+     ["p2"]=>
050+     int(0)
051+     ["p3"]=>
052+     int(0)
053+     ["p4"]=>
054+     string(20) "SCAN 2 CONSTANT ROWS"
055+     ["p5"]=>
056+     int(0)
057+     ["comment"]=>
058+     NULL
059+   }
060+   [3]=>
061+   array(8) {
062+     ["addr"]=>
063+     int(3)
064+     ["opcode"]=>
         string(7) "String8"
         ["p1"]=>
         int(0)
--
         ["p1"]=>
         int(3)
         ["p2"]=>
164-     int(13)
183+     int(14)
         ["p3"]=>
         int(0)
         ["p4"]=>
--
         ["p1"]=>
         int(0)
         ["p2"]=>
240-     int(8)
259+     int(9)
         ["p3"]=>
         int(0)
         ["p4"]=>
--

[NattyNarwhal]

Just the additional entry now:

--
         ["addr"]=>
         int(2)
         ["opcode"]=>
046+     string(7) "Explain"
047+     ["p1"]=>
048+     int(2)
049+     ["p2"]=>
050+     int(0)
051+     ["p3"]=>
052+     int(0)
053+     ["p4"]=>
054+     string(20) "SCAN 2 CONSTANT ROWS"
055+     ["p5"]=>
056+     int(0)
057+     ["comment"]=>
058+     NULL
059+   }
060+   [3]=>
061+   array(8) {
062+     ["addr"]=>
063+     int(3)
064+     ["opcode"]=>
         string(7) "String8"
         ["p1"]=>
         int(0)
--

[NattyNarwhal]

Unfortunately doesn't change the output.

[NattyNarwhal]

Fixes it!

PASS Pdo\Sqlite::ATTR_EXPLAIN_STATEMENT usage [ext/pdo_sqlite/tests/subclasses/pdo_sqlite_getsetattr_explain.phpt] 

[devnexen]

Yay ! Note to myself, to apply similar fixes to the pure sqlite version !