Don't put migrations for the new version into a directory for a released version

[php-coder]

At least the following were misplaced:

$ git diff 0.4.2..HEAD -- src/main/resources/liquibase/version/0.4.2.xml
diff --git a/src/main/resources/liquibase/version/0.4.2.xml b/src/main/resources/liquibase/version/0.4.2.xml
index cf1cc60c..dbf5df9c 100644
--- a/src/main/resources/liquibase/version/0.4.2.xml
+++ b/src/main/resources/liquibase/version/0.4.2.xml
@@ -7,5 +7,7 @@

        <include file="0.4.2/2019-11-17--drop_unique_series_from_collection.xml" relativeToChangelogFile="true" />
        <include file="0.4.2/2019-11-27--add_collections_series_id.xml" relativeToChangelogFile="true" />
+       <include file="0.4.2/2020-02-11--downloading_failed_import_requests.xml" relativeToChangelogFile="true" />
+       <include file="0.4.2/2020-02-12--empty_price_import_request.xml" relativeToChangelogFile="true" />

 </databaseChangeLog>

[php-coder]

Done.