bump library version to v1.3.1, should be ABI-compatible
bump library version to v1.3.1, should be ABI-compatible

eighthave/libsqlfs,guardianproject/libsqlfs,spthaolt/libsqlfs,guardianproject/libsqlfs,guardianproject/libsqlfs,guardianproject/libsqlfs,spthaolt/libsqlfs,eighthave/libsqlfs,eighthave/libsqlfs,spthaolt/libsqlfs,guardianproject/libsqlfs,spthaolt/libsqlfs,eighthave/libsqlfs,spthaolt/libsqlfs,eighthave/libsqlfs