Bump indexmap to 2.0 (#9643)

# Description
Apart from `polars` (only used with `--features dataframe`) and the
dev-dependencies our deps use `indexmap 2.0`.
Thus the default or `extra` `cargo build` will reduce deps.
This also will help deduplicating `hashbrown` and `ahash`.

For #8060

- Bump `indexmap` to 2.0
- Remove unneeded `serde` feature from `indexmap`

# User-Facing Changes
None

crates/nu-cmd-base/Cargo.toml

@@ -13,4 +13,4 @@ version = "0.82.1"
 nu-engine = { path = "../nu-engine", version = "0.82.1" }
 nu-path = { path = "../nu-path", version = "0.82.1" }
 nu-protocol = { version = "0.82.1", path = "../nu-protocol" }
-indexmap = { version = "1.7", features = ["serde-1"] }
+indexmap = { version = "2.0" }

crates/nu-cmd-dataframe/Cargo.toml

@@ -20,7 +20,7 @@ nu-protocol = { path = "../nu-protocol", version = "0.82.1" }
 # Potential dependencies for extras
 chrono = { version = "0.4", features = ["std", "unstable-locales"], default-features = false }
 fancy-regex = "0.11"
-indexmap = { version = "1.7", features = ["serde-1"] }
+indexmap = { version = "2.0" }
 num = { version = "0.4", optional = true }
 serde = { version = "1.0", features = ["derive"] }
 sqlparser = { version = "0.34", features = ["serde"], optional = true }

crates/nu-command/Cargo.toml

@@ -49,7 +49,7 @@ filesize = "0.2"
 filetime = "0.2"
 fs_extra = "1.3"
 htmlescape = "0.3"
-indexmap = { version = "1.7", features = ["serde-1"] }
+indexmap = "2.0"
 indicatif = "0.17"
 is-root = "0.1"
 itertools = "0.10"

crates/nu-protocol/Cargo.toml

@@ -19,7 +19,7 @@ byte-unit = "4.0"
 chrono = { version = "0.4", features = [ "serde", "std", "unstable-locales" ], default-features = false }
 chrono-humanize = "0.2"
 fancy-regex = "0.11"
-indexmap = { version = "1.7" }
+indexmap = "2.0"
 lru = "0.10"
 miette = { version = "5.9", features = ["fancy-no-backtrace"] }
 num-format = "0.4"

crates/nu_plugin_formats/Cargo.toml

@@ -12,7 +12,7 @@ version = "0.82.1"
 nu-plugin = { path = "../nu-plugin", version = "0.82.1" }
 nu-protocol = { path = "../nu-protocol", version = "0.82.1", features = ["plugin"] }
 
-indexmap = { version = "1.7", features = ["serde-1"] }
+indexmap = "2.0"
 eml-parser = "0.1"
 ical = "0.8"
 rust-ini = "0.19.0"