Dgraph v1.0.18

Fixed

• Preserve the order of entries in a mutation if multiple versions of the same
  edge are found. This addresses the mutation re-ordering change (#2987) from v1.0.15.
• Fixing the zero client in live loader to avoid using TLS. Fixes #3919. (#3936)
• Remove query cache which is causing contention. (#4071).
• Fix bug when querying with nested levels of expand(_all_). Fixes #3807. (#4143).
• Vendor in Badger to fix a vlog bug "Unable to find log file". (#4212)
• Change lexer to allow unicode escape sequences. Fixes #4157. (#4252)