add ojs-base 0.1.0
fix url md5
ojs-base: fix deps and package name
fix ojs-base md5sum
ojs-base depends on ppx_deriving_json < 2.0
OASIS 0.4.5
Merge pull request #2920 from jpdeplaix/master

OASIS 0.4.5
Merge pull request #2914 from zoggy/master

Add ojs-base 0.1.0