build(deps): bump github.com/linxGnu/grocksdb from 1.7.16 to 1.8.1

Bumps [github.com/linxGnu/grocksdb](https://github.com/linxGnu/grocksdb) from 1.7.16 to 1.8.1.
- [Release notes](https://github.com/linxGnu/grocksdb/releases)
- [Commits](linxGnu/grocksdb@v1.7.16...v1.8.1)

---
updated-dependencies:
- dependency-name: github.com/linxGnu/grocksdb
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

go.mod

@@ -7,7 +7,7 @@ require (
 	github.com/gogo/protobuf v1.3.2
 	github.com/google/btree v1.1.2
 	github.com/jmhodges/levigo v1.0.0
-	github.com/linxGnu/grocksdb v1.7.16
+	github.com/linxGnu/grocksdb v1.8.1
 	github.com/stretchr/testify v1.8.4
 	github.com/syndtr/goleveldb v1.0.1-0.20200815110645-5c35d600f0ca
 	go.etcd.io/bbolt v1.3.7

go.sum

@@ -59,8 +59,8 @@ github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORN
 github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
 github.com/kr/text v0.1.0 h1:45sCR5RtlFHMR4UwH9sdQ5TC8v0qDQCHnXt+kaKSTVE=
 github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
-github.com/linxGnu/grocksdb v1.7.16 h1:Q2co1xrpdkr5Hx3Fp+f+f7fRGhQFQhvi/+226dtLmA8=
-github.com/linxGnu/grocksdb v1.7.16/go.mod h1:JkS7pl5qWpGpuVb3bPqTz8nC12X3YtPZT+Xq7+QfQo4=
+github.com/linxGnu/grocksdb v1.8.1 h1:42gaOh2OArHp86/Edr0iCX46oFBwJK0YwAZnETS6Jic=
+github.com/linxGnu/grocksdb v1.8.1/go.mod h1:xZCIb5Muw+nhbDK4Y5UJuOrin5MceOuiXkVUR7vp4WY=
 github.com/magiconair/properties v1.8.0/go.mod h1:PppfXfuXeibc/6YijjN8zIbojt8czPbwD3XqdrwzmxQ=
 github.com/mitchellh/go-homedir v1.1.0/go.mod h1:SfyaCUpYCn1Vlf4IUYiD9fPX4A5wJrkLzIz1N1q0pr0=
 github.com/mitchellh/mapstructure v1.1.2/go.mod h1:FVVH3fgwuzCH5S8UJGiWEs2h04kUh9fWfEaFds41c1Y=