Release notes for #2013

newsfragments/2013.bugfix.rst

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+- Use UTC timestamp instead of local time zone, when creating a header.
+- Use UTC for clique validation.

newsfragments/2013.feature.rst

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+Implement `EIP-1559 <https://eips.ethereum.org/EIPS/eip-1559>`_ for London support.

newsfragments/2013.internal.rst

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+- some test_vm fixes:
+  - use the correctly paired VMs in PoW test
+  - make sure *only* the block number is invalid in block number validity test
+- more robust test fixture name generation
+- run a newer version of the lint test from `make lint`

newsfragments/2013.removal.rst

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+- Can no longer supply some fields to the genesis, like bloom and parent_hash.
+- :meth:`eth.rlp.headers.BlockHeader.from_parent()` is gone, because you should
+  always use the VM to create a header (to make sure you get the correct type).