deps: bump dotenv from 17.4.2 to 18.0.2 in /samples/node/login-auth-code

[dependabot]

Bumps dotenv from 17.4.2 to 18.0.2.

Changelog

Sourced from dotenv's changelog.

18.0.2 (2026-09-21)

Changed

• Patch additional edge cases for the fast parser (#1056)

18.0.1 (2026-09-18)

Changed

• Handle file urls in config logging (#1054)

18.0.0 (2026-09-17)

Added

• NEW: Dotenv now has a CLI. (#1022)

$ dotenv run -- node index.js
◇ injected env (2) from .env
Hello Dotenv

• NEW: Dotenv now has a fast parser thanks to @​homanp of superagent.sh. Pass config({ fast: true }), flag --fast, or set DOTENV_FAST=true to opt-in to ~2x faster character-scanner parser. (#1010)

$ dotenv run --fast -- node index.js
◇ injected env (2) from .env
Hello Dotenv

Changed

• Injecting message sent to stderr rather than stdout and tips removed (#1037)

Removed

• Remove tips (#1031)
• Remove skill files (#1032)
• Remove Spanish README (#1034)
• Remove .env.vault support (#1033)
• Remove preloading. Instead use cli dotenv run -- your-command (#1035)

Commits

• 5203712 perf: skip quoted text and short-circuit ASCII whitespace checks
• c69ed11 chore: align package version with 18.0.2 changelog
• 2db9acf fix: retain closing quote candidates in the fast scanner
• ccc8543 test: reproduce fast scanner backslash and closing quote differences
• 048dd48 fix: scan colon separators, export keys and Unicode line endings
• e73dc1f changelog
• c077457 Merge pull request #1056 from motdotla/1043-fast-parser-regression-tests
• 0772edb fix: handle parser regressions directly in the fast scanner
• 03bcdbb fix: preserve classic parser behavior for fast parser edge cases
• 4dcbf5d test: reproduce fast parser divergences from issue #1043
• Additional commits viewable in compare view