Replace links to eth2.0-specs with consensus-specs (#3934)

* Replace references to eth2.0

* Revert changes to the deposit contract dir

Author: jtraglia

README.md

@@ -8,7 +8,7 @@ This repository hosts the current Ethereum proof-of-stake specifications. Discus
 
 ## Specs
 
-[![GitHub release](https://img.shields.io/github/v/release/ethereum/eth2.0-specs)](https://github.com/ethereum/eth2.0-specs/releases/) [![PyPI version](https://badge.fury.io/py/eth2spec.svg)](https://badge.fury.io/py/eth2spec)
+[![GitHub release](https://img.shields.io/github/v/release/ethereum/consensus-specs)](https://github.com/ethereum/consensus-specs/releases/) [![PyPI version](https://badge.fury.io/py/eth2spec.svg)](https://badge.fury.io/py/eth2spec)
 
 Core specifications for Ethereum proof-of-stake clients can be found in [specs](specs/). These are divided into features.
 Features are researched and developed in parallel, and then consolidated into sequential upgrades when ready.

ssz/simple-serialize.md

@@ -263,7 +263,7 @@ We similarly define "summary types" and "expansion types". For example, [`Beacon
 
 ## Implementations
 
-See https://github.com/ethereum/eth2.0-specs/issues/2138 for a list of current known implementations.
+See https://github.com/ethereum/consensus-specs/issues/2138 for a list of current known implementations.
 
 ## JSON mapping
 

tests/core/pyspec/eth2spec/test/phase0/finality/test_finality.py

@@ -137,7 +137,7 @@ def test_finality_rule_2(spec, state):
 def test_finality_rule_3(spec, state):
     """
     Test scenario described here
-    https://github.com/ethereum/eth2.0-specs/issues/611#issuecomment-463612892
+    https://github.com/ethereum/consensus-specs/issues/611#issuecomment-463612892
     """
     # get past first two epochs that finality does not run on
     next_epoch_via_block(spec, state)