Fix GitHub Dependabot dependency alerts

[pke]

Updates the runtime and development parents responsible for all 41 open GitHub Dependabot alerts in package-lock.json.

Changes:

• update got 10 to the patched CommonJS-compatible 11.8.6 release
• update parse-link-header to 2.0.0
• update ESLint 6 and eslint-plugin-node 10 to their compatible 8/11 releases
• update Tap 14 to Tap 18, removing the obsolete esm/coverage tree containing unpatched request and babel-traverse
• migrate removed t.is assertions to t.equal
• ignore Tap 18's generated .tap cache

Application source files are unchanged.

Verification:

• npm ci --ignore-scripts
• npm test (4 test files, 18 assertions, 0 failures)
• syntax checks for source, tests, and bundled plugins
• runtime smoke checks for got and parse-link-header
• dependency-tree comparison against GitHub Dependabot patch levels

Existing lint status: six pre-existing errors remain (two unused variables in src/cli.js and four node/no-unpublished-require reports for the test-only Tap dependency). They are outside this dependency-alert change and were left untouched. The previous Tap 14 runner crashed before executing tests on current Node; Tap 18 completes successfully.