Update DEVX_ROADMAP.md (MystenLabs#6549)

DEVX_ROADMAP.md

@@ -8,14 +8,15 @@ To keep Sui builders up-to-date with the latest happenings, we provide the follo
 ## Highlights
 
  * We plan to add the ability for developers to depend on packages from third-party package managers. More information in the following sections.
+ * We are introducing Lamport Timestamps, a new mechanism to version Objects. More details below.
  * We continue to make stability and performance improvements to our JSON RPC APIs.
  * We intend to introduce signing support soon. 
 
 
 ## JSON RPC
 
  * Remove the requirement for a user signature from `sui_dryRunTransaction`. **Breaking Change**.
- * Add RPC support for Dynamic Fields. [Issue](https://github.com/MystenLabs/sui/pull/5882).
+ * Add RPC support for Dynamic Fields [[Issue](https://github.com/MystenLabs/sui/pull/5882)].
  * Fold `getRawObject` method into `getObject` method, and use the `DataEncoding` argument to choose between parsedJSON and BCS encoding types.
  * Add new `getCoin` and `getBalance` methods.
  * Standardize the return type of `u64`,`u128`, and `u256` values to `string`.
@@ -27,14 +28,16 @@ To keep Sui builders up-to-date with the latest happenings, we provide the follo
 
 ## SDK (Typescript, Rust)
 
- * Introduce intent signing support. This includes an `intent` struct to serialize and sign in addition to the transaction data. [Issue](https://github.com/MystenLabs/fastcrypto/issues/26).
+ * Introduce intent signing support. This includes an `intent` struct to serialize and sign in addition to the transaction data [[Issue](https://github.com/MystenLabs/fastcrypto/issues/26)].
  * Add support to compute transaction digest.
 
 ## Sui Move
 
  * Improve source discoverability.
     * Add the ability for developers to verify source code dependencies against their on-chain counterparts when publishing packages.
     * Enable third-party package managers like Movey to resolve dependencies in Sui Move packages. This enables library developers to distribute their packages under easy-to-identify names. This also removes the error-prone need for developers to remember the GitHub repository, revision, and subdirectories for all their dependencies.
+ * Introduce a dev-inspect transaction type that can dry-run any Move function [[RFC](https://github.com/MystenLabs/sui/pull/6538)].
+ * Introduce Lamport Timestamps for Object versioning. As opposed to the existing mechanism of incrementing an Object's version by one when it gets mutated, all the Objects mutated by a transaction get bumped to the same version, which is the smallest version that's greater than all input versions [[PR](https://github.com/MystenLabs/sui/pull/6163)]. As a result, it is no longer possible to discover previous version(s) of an Object by decrementing its `SequenceNumber` by one, because a transaction could increase an object's version by more than one. We are working on exposing an API to directly obtain an Object's previous version [[Issue](https://github.com/MystenLabs/sui/issues/6529)].
  * Better debug printing for structs (including field names + nice formatting).