Bump protocol versions to 1.0.0 in preparation for the Mainnet

[tjanez]

Also, document how to include protocol versions in the Change Log.

[codecov]

Codecov Report

Merging #3249 into master will increase coverage by 0.00%.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #3249   +/-   ##
=======================================
  Coverage   67.66%   67.66%           
=======================================
  Files         370      370           
  Lines       36327    36327           
=======================================
+ Hits        24580    24582    +2     
+ Misses       8588     8586    -2     
  Partials     3159     3159           

Impacted Files	Coverage Δ
go/common/version/version.go	84.00% <ø> (ø)
go/oasis-node/cmd/common/metrics/disk.go	65.51% <0.00%> (-20.69%)	⬇️
go/oasis-node/cmd/common/metrics/resource.go	84.00% <0.00%> (-8.00%)	⬇️
...n/crypto/signature/signers/memory/memory_signer.go	71.42% <0.00%> (-4.77%)	⬇️
go/worker/compute/executor/committee/node.go	64.16% <0.00%> (-3.89%)	⬇️
go/storage/mkvs/tree.go	89.28% <0.00%> (-3.58%)	⬇️
go/storage/api/root_cache.go	77.77% <0.00%> (-3.18%)	⬇️
go/storage/mkvs/insert.go	87.75% <0.00%> (-2.73%)	⬇️
go/worker/common/committee/node.go	76.16% <0.00%> (-2.60%)	⬇️
go/consensus/tendermint/roothash/roothash.go	72.31% <0.00%> (-2.26%)	⬇️
... and 25 more

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