[bug] Doesn't extract puzzles from JS files that has a shebang

See #214, release log:

• 2fc6858 by @yegor256: #214 rultor up
• fcbb8a7 by @yegor256: #214 reproduced and fixed
• cd05f3d by @yegor256: #214 still cannot reproduce
• b1b0ea0 by @yegor256: #214 cannot reproduce
• d4291eb by @yegor256: #214 rubocop up
• f15a8fe by @yegor256: #214 year up to 2023
• 497d7bc by @yegor256: #214 codecov removed

Released by Rultor 2.0-SNAPSHOT, see build log