Bump github.com/sagernet/sing from 0.1.3 to 0.1.5

Bumps [github.com/sagernet/sing](https://github.com/sagernet/sing) from 0.1.3 to 0.1.5.
- [Release notes](https://github.com/sagernet/sing/releases)
- [Commits](https://github.com/sagernet/sing/compare/v0.1.3...v0.1.5)

---
updated-dependencies:
- dependency-name: github.com/sagernet/sing
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

go.mod

@@ -14,7 +14,7 @@ require (
 	github.com/pelletier/go-toml v1.9.5
 	github.com/pires/go-proxyproto v0.6.2
 	github.com/refraction-networking/utls v1.2.0
-	github.com/sagernet/sing v0.1.3
+	github.com/sagernet/sing v0.1.5
 	github.com/sagernet/sing-shadowsocks v0.1.0
 	github.com/sagernet/wireguard-go v0.0.0-20221116151939-c99467f53f2c
 	github.com/seiflotfy/cuckoofilter v0.0.0-20220411075957-e3b120b3f5fb

go.sum

@@ -148,8 +148,8 @@ github.com/riobard/go-bloom v0.0.0-20200614022211-cdc8013cb5b3/go.mod h1:HgjTstv
 github.com/rogpeppe/go-internal v1.9.0 h1:73kH8U+JUqXU8lRuOHeVHaa/SZPifC7BkcraZVejAe8=
 github.com/rogpeppe/go-internal v1.9.0/go.mod h1:WtVeX8xhTBvf0smdhujwtBcq4Qrzq/fJaraNFVN+nFs=
 github.com/russross/blackfriday v1.5.2/go.mod h1:JO/DiYxRf+HjHt06OyowR9PTA263kcR/rfWxYHBV53g=
-github.com/sagernet/sing v0.1.3 h1:G1vs7GIS7fMUvnHUvKVvOvuUrfoKRf0y+qoDhnv3Ezw=
+github.com/sagernet/sing v0.1.5 h1:1ZHE4cqqds8559RPqzmHiXkOYWyXkNDiULFr00+LxG8=
-github.com/sagernet/sing v0.1.3/go.mod h1:JLSXsPTGRJFo/3X7EcAOCUgJH2/gAoxSJgBsnCZRp/w=
+github.com/sagernet/sing v0.1.5/go.mod h1:JLSXsPTGRJFo/3X7EcAOCUgJH2/gAoxSJgBsnCZRp/w=
 github.com/sagernet/sing-shadowsocks v0.1.0 h1:cDmmOkA11fzVdhyCZQEeI3ozQz+59rj8+rqPb91xux4=
 github.com/sagernet/sing-shadowsocks v0.1.0/go.mod h1:O5LtOs8Ivw686FqLpO0Zu+A0ROVE15VeqEK3yDRRAms=
 github.com/sagernet/wireguard-go v0.0.0-20221116151939-c99467f53f2c h1:vK2wyt9aWYHHvNLWniwijBu/n4pySypiKRhN32u/JGo=