Bump obj-rs from 0.6.0 to 0.7.0

Bumps [obj-rs](https://github.com/simnalamburt/obj-rs) from 0.6.0 to 0.7.0.
- [Release notes](https://github.com/simnalamburt/obj-rs/releases)
- [Commits](https://github.com/simnalamburt/obj-rs/commits)

---
updated-dependencies:
- dependency-name: obj-rs
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

Cargo.lock

@@ -13,7 +13,7 @@ winit = "=0.27.5"
 shaderc = "=0.7"
 cfg-if = "=1.0.0"
 rand = "=0.8.5"
-obj-rs = "=0.6.0"
+obj-rs = "=0.7.0"
 
 # GFX-RS backends
 gfx-backend-gl = { version="=0.9.0", optional = true }