RAP-1618 Skip files in .pub directories when formatting

[todbachman-wf]

Problem:

When you specify a set of files to be excluded during formatting dart_dev walks the file structure and identifies each file that should be formatted. Currently it is picking up files in .pub folders. dartfmt skips those folders, so ddev format should too.

Solution:

Updated the format task to skip folders named .pub.

+10/QA:

• CI build passes
• Link dart_dev into a project with .pub directories and files excluded from formatting
• Run ddev format on that project
• Confirm dart files in.pub directories are not formatted

[evanweible-wf]

+1

[maxwellpeterson-wf]

+1

[bencampbell-wf]

+1

[bencampbell-wf]

+10

Things Tested

• CI build passes
• Link dart_dev into a project with .pub directories and files excluded from formatting
• Run ddev format on that project
• Confirm dart files in.pub directories are not formatted

[jayudey-wf]

@bencampbell-wf I will run the test locally and that should suffice to cover the failing tests, TravisCI has had some inconsistencies when running tests in the pass

[jayudey-wf]

test pass locally, will let that constitute as a passing result for this CI process

[jayudey-wf]

QA: +1

• Testing instruction
• Dev +1's
• Dev/QA +10 with detail of what was tested
  • performed and documented by Ben
• Unit test created/updated
• All unit tests pass (passing locally)

Merging into master.