fix: bulk returning a promise of array of promise

chore: it's pretty stable I think

Merge pull request yakovmeister#5 from yakovmeister/next

Next

patch: 1.1.5

Merge branch '1.0' of https://github.com/yakovmeister/pdf2image into 1.0

update gitignore

finalize for npm publish

readme revisions

update readme.md