fix signature parsing by stopping part of the verification process

.gitignore

__tests__/index.test.ts

...XXX-nopodofo-test-v.1.7-signed-pades-baseline-b-image.pdf

...x-OpenOfficeWriter-v1.4-signed-pades-baseline-b-image.pdf

...reOfficeWriterTest-v1.6-signed-pades-baseline-b-image.pdf

...us/Signed-mac-Adobe-1.3-signed-pades-baseline-b-image.pdf

...nopodofo-test-v.1.7-signed-pades-baseline-b-signature.pdf

...enOfficeWriter-v1.4-signed-pades-baseline-b-signature.pdf

...OfficeWriterTest-v1.6-signed-pades-baseline-b-im11age.pdf

...ficeWriterTest-v1.6-signed-pades-baseline-b-signature.pdf

...igned-mac-Adobe-1.3-signed-pades-baseline-b-signature.pdf

__tests__/outputs/nopodofo/abacus-one–signature-im11age.pdf

...reOfficeWriterTest-v1.6-signed-pades-baseline-b-image.pdf

__tests__/outputs/pdflib/abacus-one–signature-image.pdf

__tests__/outputs/pdfs-signed.zip

...reOfficeWriterTest-v1.6-signed-pades-baseline-b-image.pdf

__tests__/outputs/tron/abacus-one–signature-im11age.pdf

__tests__/outputs/tron/abacus-two-signatures-im11age.pdf

__tests__/source/example.pdf

__tests__/source/test.txt