Update README.md

README.md

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-# cargotom
+# cargotom
+## Features
+### Code actions
+- "Make Workspace dependency" => This will generate `{ workspace = true }` for the dependency
+- "Expand dependency specification" => This will convert from `"0.1.0"` to `{ version = "0.1.0" }`
+- "Collapse dependency specification" => This will convert from `{ version = "0.1.0" }` to `"0.1.0`
+- "Open Docs" => opens docs.rs/...
+- "Open crates.io" => opens crates.io/...
+- "Upgrade" => will upgrade the dependency version to the latest version
+- "Upgrade All " => will upgrade every dependency version to the latest version
+- "Update All" => will run `cargo run`
+
+### Code completion
+#### Dependencies
+- crate names(online/offline)
+- crate versions(online/offline)
+- crate features(online/offline)
+- feature key when version after the key `crate = "0.1.0"` => `crate = {ve"0.1.0"` to `crate = { version = "0.1.0" }`
+
+### Diagnostics
+- check if crate needs update
+- check if crate version exists
+- check if crate features exist