Update prettytable-rs requirement from 0.8.0 to 0.9.0 (#1446)

Updates the requirements on [prettytable-rs](https://github.com/phsym/prettytable-rs) to permit the latest version.
- [Release notes](https://github.com/phsym/prettytable-rs/releases)
- [Commits](phsym/prettytable-rs@v0.8.0...v0.9.0)

---
updated-dependencies:
- dependency-name: prettytable-rs
  dependency-type: direct:production
...

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fastfield_codecs/Cargo.toml

@@ -11,7 +11,7 @@ description = "Fast field codecs used by tantivy"
 [dependencies]
 common = { version = "0.3", path = "../common/", package = "tantivy-common" }
 tantivy-bitpacker = { version="0.2", path = "../bitpacker/" }
-prettytable-rs = {version="0.8.0", optional= true}
+prettytable-rs = {version="0.9.0", optional= true}
 rand = {version="0.8.3", optional= true}
 
 [dev-dependencies]