[Tests] only install peer dependencies with legacy mode when testing @typescript-eslint/parser < v6

Author: hampustagerud

.github/workflows/node-18+.yml

@@ -104,7 +104,7 @@ jobs:
           after_install: |
             npm install --no-save "eslint@${{ matrix.eslint }}" "@typescript-eslint/parser@${{ matrix.typescript-eslint }}" "babel-eslint@${{ matrix.babel-eslint }}"
         env:
-          NPM_CONFIG_LEGACY_PEER_DEPS: true
+          NPM_CONFIG_LEGACY_PEER_DEPS: "${{ matrix.typescript-eslint >= 6 && 'false' || 'true' }}"
       - run: npx ls-engines
       - run: npm run unit-test
       - uses: codecov/[email protected]

.github/workflows/node-minors.yml

@@ -103,7 +103,7 @@ jobs:
             npm install --no-save "eslint@${{ matrix.eslint }}" "@typescript-eslint/parser@${{ matrix.node-version >= 18 && matrix.eslint >= 8 && '8' || (matrix.node-version >= 16 && matrix.eslint >= 7 && '6' || (matrix.node-version >= 14 && '5' || (matrix.node-version >= 12 && '4' || (matrix.node-version >= 10 && '4.0' || (matrix.node-version >= 8 && '3' || '2'))))) }}" "babel-eslint@${{ matrix.babel-eslint }}"
           skip-ls-check: ${{ matrix.node-version < 10 && true || false }}
         env:
-          NPM_CONFIG_LEGACY_PEER_DEPS: true
+          NPM_CONFIG_LEGACY_PEER_DEPS: "${{ matrix.node-version >= 16 && matrix.eslint >= 7 && 'false' || 'true' }}"
       - run: npx ls-engines
         if: ${{ matrix.node-version >= 12 }}
       - run: npm run unit-test