improve(series import): extract year when it ends with a dot.

Fix #1312

Author: php-coder

src/main/java/ru/mystamps/web/feature/series/importing/SeriesInfoExtractorServiceImpl.java

@@ -56,7 +56,7 @@ public class SeriesInfoExtractorServiceImpl implements SeriesInfoExtractorServic
 	// Year should be in range within 1840 and 2099 inclusive.
 	// CheckStyle: ignore LineLength for next 2 lines
 	private static final Pattern RELEASE_DATE_REGEXP =
-		Pattern.compile("((?<day>[0-9]{2})\\.(?<month>[0-9]{2})\\.)?(?<year>18[4-9][0-9]|19[0-9]{2}|20[0-9]{2})(г(од|\\.)?)?");
+		Pattern.compile("((?<day>[0-9]{2})\\.(?<month>[0-9]{2})\\.)?(?<year>18[4-9][0-9]|19[0-9]{2}|20[0-9]{2})(г(од|\\.)?|\\.)?");
 
 	// Regular expression matches number of the stamps in a series (from 1 to 999).
 	// CheckStyle: ignore LineLength for next 2 lines

src/test/groovy/ru/mystamps/web/feature/series/importing/SeriesInfoExtractorServiceImplTest.groovy

@@ -288,6 +288,7 @@ class SeriesInfoExtractorServiceImplTest extends Specification {
 			'2010\t\tbrazil'                 | _
 			'2010     brazil'                | _
 			'prehistoric animals 2010 congo' | _
+			'2010.'                          | _
 			'2010г'                          | _
 			'2010г.'                         | _
 			'2010год'                        | _