Use canonical package metadata

[tomaserben]

Summary

• update package support metadata to the canonical stephenlacy/gulp-git GitHub URLs
• use a public git+https repository URL instead of legacy HTTP metadata
• add an explicit bugs.url so npm points users to the current issue tracker

Validation

• node -e 'const p=require("./package.json"); if (p.repository.url !== "git+https://github.com/stephenlacy/gulp-git.git") throw new Error(p.repository.url); if (p.homepage !== "https://github.com/stephenlacy/gulp-git") throw new Error(p.homepage); if (p.bugs.url !== "https://github.com/stephenlacy/gulp-git/issues") throw new Error(p.bugs.url); console.log(p.name, p.version, p.repository.url, p.homepage, p.bugs.url)'\n- npm pack --dry-run --json\n- git diff --check

[stephenlacy]

will not merge ai slop