Updated seafile version to 6.0.7

Update version to 6.0.6.

lianyou: Update the version of the installed after fixing login bug.

Update version to 6.0.4.

support building debug msi packages.

Speed up windows build.

[RPC] Fix integer type conversion when returning task object.

Update version to 6.0.1.

Update versions to 6.0.0

Improved file checkout procedure.