Update rand_xoshiro requirement from 0.6 to 0.7

Updates the requirements on [rand_xoshiro](https://github.com/rust-random/rngs) to permit the latest version.
- [Commits](rust-random/rngs@rand_xoshiro-0.6.0...rand_xoshiro-0.7.0)

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

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

Cargo.toml

@@ -38,7 +38,7 @@ triomphe = ["archery/triomphe"]
 bitmaps = "3"
 imbl-sized-chunks = "0.1.3"
 rand_core = "0.6.3"
-rand_xoshiro = "0.6"
+rand_xoshiro = "0.7"
 archery = "1.2.1"
 quickcheck = { version = "1.0", optional = true }
 proptest = { version = "1.0", optional = true }