Merge "Bump justinrainbow/json-schema development dependency to ~5.2"

diff --combined composer.json
index b9bbe00,25706d5..83fcda0
--- 1/composer.json
--- 2/composer.json
+++ b/composer.json
@@@ -33,7 -33,7 +33,7 @@@
                "wikimedia/base-convert": "1.0.1",
                "wikimedia/cdb": "1.4.1",
                "wikimedia/cldr-plural-rule-parser": "1.0.0",
 -              "wikimedia/composer-merge-plugin": "1.4.0",
 +              "wikimedia/composer-merge-plugin": "1.4.1",
                "wikimedia/html-formatter": "1.0.1",
                "wikimedia/ip-set": "1.1.0",
                "wikimedia/php-session-serializer": "1.0.4",
@@@ -52,7 -52,7 +52,7 @@@
                "hamcrest/hamcrest-php": "^2.0",
                "jakub-onderka/php-parallel-lint": "0.9.2",
                "jetbrains/phpstorm-stubs": "dev-master#1b9906084d6635456fcf3f3a01f0d7d5b99a578a",
-               "justinrainbow/json-schema": "~3.0",
+               "justinrainbow/json-schema": "~5.2",
                "mediawiki/mediawiki-codesniffer": "0.8.1",
                "monolog/monolog": "~1.22.1",
                "nikic/php-parser": "2.1.0",