vendor: update go.etcd.io/bbolt v1.3.4

full diff: https://github.com/etcd-io/bbolt/compare/v1.3.3...v1.3.4

- Fix unsafe pointer conversions caught by Go 1.14 checkptr
- Fix unexpected delete bucket error: "delete bucket: incompatible value"
- Add support for aix
- Add go.mod
- db.Path() resolves to db.file.Name()

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

vendor/go.etcd.io/bbolt/freelist_hmap.go

@@ -27,7 +27,7 @@ func (f *freelist) hashmapAllocate(txid txid, n int) pgid {
 			f.allocs[pid] = txid
 
 			for i := pgid(0); i < pgid(n); i++ {
-				delete(f.cache, pid+pgid(i))
+				delete(f.cache, pid+i)
 			}
 			return pid
 		}