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/bolt_unix.go

@@ -1,4 +1,4 @@
-// +build !windows,!plan9,!solaris
+// +build !windows,!plan9,!solaris,!aix
 
 package bbolt