Update known issues for the next revive release (#33)

Signed-off-by: Cyrill Leutwiler <[email protected]>

docs/known_issues/index.md

@@ -15,7 +15,7 @@ The following compiler issues are known and we are working on it. Please do not
 
 ### Release
 
-resolc `0.1.0-dev.5`
+resolc `0.1.0-dev.6`
 
 ### Missing features
 
@@ -24,14 +24,10 @@ resolc `0.1.0-dev.5`
 - The emulated EVM linear contract memory is limited to 64kb in size. Will be fixed with support for metered dynamic memory.
 - [The contract calldata is currently limited to 1kb in size](https://github.com/paritytech/revive/issues/57)
 - [EIP-4844 opcodes are not supported](https://github.com/paritytech/revive/issues/64)
-- [Delegate calls are not supported](https://github.com/paritytech/revive/issues/67)
-- [The `blockhash` opcode is not supported](https://github.com/paritytech/revive/issues/61)
 - [Gas limits for contract calls are ignored](https://github.com/paritytech/revive/issues/60)
 - [Gas related opcodes are not supported](https://github.com/paritytech/revive/issues/60)
 - IPFS metadata hashes are not supported
 - [Compiled contract artifacts can exceed the pallet static memory limit and fail to deploy](https://github.com/paritytech/revive/issues/96).
-- [Transfers to inexistent accounts will fail if the transferred value lies below the ED.](https://github.com/paritytech/revive/issues/83) Will be fixed in the pallet to make the ED completely transparent for contracts.
-- [Source level debug information and contract execution tracing](https://github.com/paritytech/revive/issues/18)
 - [Compiling contracts requiring `solc` version earlier than `0.8.0` requires using the EVM legacy assembly pipeline. This is in a highly experimental state.](https://github.com/paritytech/revive/issues/89)
 
 ## REMIX