Bump github.com/golang/protobuf from 1.3.1 to 1.5.2 (#6)

Bumps [github.com/golang/protobuf](https://github.com/golang/protobuf) from 1.3.1 to 1.5.2.
- [Release notes](https://github.com/golang/protobuf/releases)
- [Commits](golang/protobuf@v1.3.1...v1.5.2)

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

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

go.mod

@@ -4,7 +4,7 @@ require (
 	github.com/fogleman/gg v1.3.0
 	github.com/gmlewis/go3d v0.0.2
 	github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0 // indirect
-	github.com/golang/protobuf v1.3.1
+	github.com/golang/protobuf v1.5.2
 	github.com/yofu/dxf v0.0.0-20190320002657-c8b82bb2fe97
 	golang.org/x/image v0.0.0-20190523035834-f03afa92d3ff // indirect
 )

go.sum

@@ -4,10 +4,18 @@ github.com/gmlewis/go3d v0.0.2 h1:VtNVF1b9nW557xcIXoEYMVVprnKn6Iul/8IUbYeOMNM=
 github.com/gmlewis/go3d v0.0.2/go.mod h1:NQ7fN6W+8Nu+SEsFWMpMhy6IZlRBMb4hAwItuxqNMz0=
 github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0 h1:DACJavvAHhabrF08vX0COfcOBJRhZ8lUbR+ZWIs0Y5g=
 github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0/go.mod h1:E/TSTwGwJL78qG/PmXZO1EjYhfJinVAhrmmHX6Z8B9k=
-github.com/golang/protobuf v1.3.1 h1:YF8+flBXS5eO826T4nzqPrxfhQThhXl0YzfuUPu4SBg=
-github.com/golang/protobuf v1.3.1/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
+github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk=
+github.com/golang/protobuf v1.5.2 h1:ROPKBNFfQgOUMifHyP+KYbvpjbdoFNs+aK7DXlji0Tw=
+github.com/golang/protobuf v1.5.2/go.mod h1:XVQd3VNwM+JqD3oG2Ue2ip4fOMUkwXdXDdiuN0vRsmY=
+github.com/google/go-cmp v0.5.5 h1:Khx7svrCpmxxtHBq5j2mp/xVjsi8hQMfNLvJFAlrGgU=
+github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/yofu/dxf v0.0.0-20190320002657-c8b82bb2fe97 h1:sb3D/zEhnf7epojcQ1BIQePzLmRRdlyRh7uP3UWANSU=
 github.com/yofu/dxf v0.0.0-20190320002657-c8b82bb2fe97/go.mod h1:gnT4GQzgKW8+TLI0xheUgdmNV4dsAN0WJUVnztRZkfI=
 golang.org/x/image v0.0.0-20190523035834-f03afa92d3ff h1:+2zgJKVDVAz/BWSsuniCmU1kLCjL88Z8/kv39xCI9NQ=
 golang.org/x/image v0.0.0-20190523035834-f03afa92d3ff/go.mod h1:kZ7UVZpmo3dzQBMxlp+ypCbDeSB+sBbTgSJuh5dn5js=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
+golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
+golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
+google.golang.org/protobuf v1.26.0 h1:bxAC2xTBsZGibn2RTntX0oH50xLsqy1OxA9tTL3p/lk=
+google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=