Add the docker app version in the bundle

[rumpl]

- What I did Added the docker app version in the generated bundle. This will help us track what we can or not do with the bundle we are dealing with.

- How to verify it

• Build an application
• Look at the generated bundle (in the bundle store), it should containe the verison of docker app in custom["com.docker.app.version"].

- A picture of a cute animal (not mandatory but encouraged)

[codecov[bot]]

Codecov Report

Merging #692 into master will increase coverage by 0.08%. The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #692      +/-   ##
==========================================
+ Coverage   71.74%   71.82%   +0.08%     
==========================================
  Files          56       56              
  Lines        2884     2889       +5     
==========================================
+ Hits         2069     2075       +6     
+ Misses        551      550       -1     
  Partials      264      264

Impacted Files	Coverage Δ
internal/names.go	100% <ø> (ø)	:arrow_up:
internal/packager/cnab.go	97.72% <100%> (+0.06%)	:arrow_up:
types/parameters/parameters.go	93.65% <0%> (+1.58%)	:arrow_up:

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