Add "wahrscheinlich" to time uncertainty indicators

src/NodaUncertaintyHelper.php

@@ -131,6 +131,8 @@ final class NodaUncertaintyHelper {
         "Vermutlich um ",
         "vmtl. ",
         "Vmtl. ",
+        "wahrscheinlich ",
+        "Wahrscheinlich ",
         "wohl ",
         "wohl um ",
         "Wohl ",

tests/NodaTimeSplitterTest.php

@@ -1303,6 +1303,19 @@ final class NodaTimeSplitterTest extends TestCase {
         self::assertEquals($output->toTimeName(), "1920-2929");
         self::assertEquals(NodaTimeSplitter::timePartsToCountingYear($output), 2425);
 
+        $output = NodaTimeSplitter::attempt_splitting("zwischen 1920 - 1929");
+        self::assertNotEmpty($output);
+        self::assertEquals($output->toOldFormat(), [
+            0 => "1920",
+            1 => "1929",
+            2 => "00",
+            3 => "00",
+            4 => "+",
+            5 => "",
+        ]);
+        self::assertEquals($output->toTimeName(), "1920-1929");
+        self::assertEquals(NodaTimeSplitter::timePartsToCountingYear($output), 1925);
+
         $output = NodaTimeSplitter::attempt_splitting("1920-től 1929-ig");
         self::assertNotEmpty($output);
         self::assertEquals($output->toOldFormat(), [