Update nanoserde requirement from 0.1.29 to 0.2.1 (#8)

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

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

Author: dependabot[bot]

Cargo.toml

@@ -11,6 +11,6 @@ readme = "README.md"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-nanoserde = "0.1.29"
+nanoserde = "0.2.1"
 crc = "3.0.0"
 lzma-rs = "0.3.0"