Support Platform APIs 0.5, 0.6

[dwillist]

Summary

implement changes needed to support platform api 0.6, Need to wait for a lifecycle release with buildpacks/lifecycle#520 to be merged and released before writing acceptance tests.

Really this PR just makes the following changes in the codebase:

• Remove process type defaults for platform API 0.6

[codecov]

Codecov Report

Merging #1051 (acbc306) into main (e53adb9) will increase coverage by 0.46%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #1051      +/-   ##
==========================================
+ Coverage   80.52%   80.97%   +0.46%     
==========================================
  Files         136      136              
  Lines        6050     8306    +2256     
==========================================
+ Hits         4871     6725    +1854     
- Misses        751     1156     +405     
+ Partials      428      425       -3     

Flag	Coverage Δ
os_linux	80.57% <100.00%> (+0.06%)	⬆️
os_macos	78.04% <83.34%> (?)
os_windows	80.89% <100.00%> (?)
unit	80.57% <100.00%> (+0.06%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

[dfreilich]

If there isn't expected to be a lifecycle update with buildpacks/lifecycle#520, should we defer this to the next milestone?

[dwillist]

@dfreilich sounds good 👍

[dfreilich]

Given the release of lifecycle v0.11.1 with the required change, this probably can be undrafted. @dwillist Is there any additional work that needs to be done to bring it up to spec, or should we start reviewing it?

[jromero]

Ping @dwillist 👋 Is this really ready to merge out are there any outstanding items?

[aemengo]

@jromero

Is this really ready to merge […]

The conversation happened out of band, but word was it’s “just waiting for reviews”

[dfreilich]

Overall, this looks great!

Quite a few of the changes were in adding a space before a comment, so there were fewer changes than I expected, and I'm sorry we didn't merge it in earlier!