Use stable rust

[nhynes]

Depends on oasisprotocol/oasis-core#3825

[codecov]

Codecov Report

Merging #71 (bedb6cc) into main (8cbd586) will decrease coverage by 3.62%.
The diff coverage is n/a.

❗ Current head bedb6cc differs from pull request most recent head 838c380. Consider uploading reports for the commit 838c380 to get more accurate results

@@            Coverage Diff             @@
##             main      #71      +/-   ##
==========================================
- Coverage   57.22%   53.60%   -3.63%     
==========================================
  Files          38        5      -33     
  Lines        1440      125    -1315     
==========================================
- Hits          824       67     -757     
+ Misses        602       44     -558     
  Partials       14       14              

Impacted Files	Coverage Δ
runtime-sdk-macros/src/event_derive.rs
runtime-sdk/src/storage/typed.rs
runtime-sdk/src/types/address.rs
runtime-sdk-macros/src/error_derive.rs
runtime-sdk/src/runtime.rs
runtime-sdk/src/testing/keys.rs
runtime-sdk/src/crypto/signature/mod.rs
runtime-sdk/src/types/token.rs
runtime-sdk-macros/src/test_utils.rs
runtime-sdk/src/testing/mock.rs
... and 13 more

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