Merge "Bumping lightncandy version from 0.18 to 0.21"

diff --cc composer.json
index 0789eee,88c5140..2f6cc42
--- 1/composer.json
--- 2/composer.json
+++ b/composer.json
@@@ -24,10 -24,9 +24,10 @@@
                "php": ">=5.3.3",
                "psr/log": "1.0.0",
                "wikimedia/cdb": "1.0.1",
 +              "wikimedia/assert": "0.2.2",
                "wikimedia/composer-merge-plugin": "1.0.0",
                "wikimedia/utfnormal": "1.0.2",
-               "zordius/lightncandy": "0.18"
+               "zordius/lightncandy": "0.21"
        },
        "require-dev": {
                "jakub-onderka/php-parallel-lint": "~0.8",