Leo 0f02a2083c testing/libzim: downgrade to 6.3.0
This reverts commit 44d10d5df221519ba4f2a141cfd9d409d1c1f284.

causes build failure for kiwix-lib
2021-11-08 02:05:56 -03:00
..
2021-11-08 02:05:56 -03:00