build(deps): update glow requirement from 0.12.0 to 0.13.0

Updates the requirements on [glow](https://github.com/grovesNL/glow) to permit the latest version.
- [Commits](https://github.com/grovesNL/glow/commits)

---
updated-dependencies:
- dependency-name: glow
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

examples/Cargo.toml

@@ -9,7 +9,7 @@ chrono = "0.4"
 
 femtovg = { version = "0.8", optional = true, default-features = false }
 glium = { version = "0.32", optional = true, default-features = false }
-glow = { version = "0.12.0", optional = true }
+glow = { version = "0.13.0", optional = true }
 epoxy = { version = "0.1.0", optional = true }
 libloading = { version = "0.8.0", optional = true }
 im-rc = { version = "15", optional = true }