Fix CONTRIBUTING.md spec tests instructions (#4840)

* Fix CONTRIBUTING.md spec tests instructions

* Add lint instructions

CONTRIBUTING.md

@@ -16,11 +16,12 @@ Thanks for your contribution to Lodestar. It's people like you that push the Eth
 
 ## Tests
 
-- :test_tube: Run `lerna run test:spec-min` for minimal spec tests.
-- :test_tube: Run `lerna run test:spec-main` for mainnet spec tests.
 - :test_tube: Run `lerna run test:unit` for unit tests.
 - :test_tube: Run `lerna run test:e2e` for end-to-end tests.
+- :test_tube: Run `lerna run test:spec` for spec tests.
 - :test_tube: Run `lerna run test` to run all tests.
+- :test_tube: Run `yarn check-types` to check TypeScript types.
+- :test_tube: Run `yarn lint` to run the linter (ESLint).
 
 ### Debugging Spec Tests
 
@@ -101,7 +102,7 @@ For example:
 
 > Add Edit on Github button to all the pages
 
-**Pull Request Etiquette** 
+**Pull Request Etiquette**
 
 - Pull requests should remain as drafts when they are not ready for review by maintainers. Open pull requests signal to the maintainers that it's ready for review.
 - If your pull request is no longer applicable or validated to fix an issue, close your pull request.

package.json

@@ -23,9 +23,7 @@
     "test:browsers": "lerna run test:browsers",
     "test:e2e": "lerna run test:e2e --no-bail --concurrency 1",
     "test:e2e:sim": "lerna run test:e2e:sim --no-bail",
-    "test:spec-min": "lerna run test:spec-min --no-bail",
-    "test:spec-fast": "lerna run test:spec-fast --no-bail",
-    "test:spec-main": "lerna run test:spec-main --no-bail",
+    "test:spec": "lerna run test:spec --no-bail",
     "benchmark": "yarn benchmark:files 'packages/*/test/perf/**/*.test.ts'",
     "benchmark:files": "LODESTAR_PRESET=mainnet NODE_OPTIONS='--max-old-space-size=4096 --loader=ts-node/esm' benchmark --config .benchrc.yaml --defaultBranch unstable",
     "release:create-rc": "node scripts/release/create_rc.mjs",