Remove Duffle dependency

[jcsirot]

- What I did The dependency on Duffle was not required anymore since Docker driver implementation moved to cnab-go library. This PR also includes a minor refactoring in parameters.go in order to handle a small API change in cnab-go

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

[codecov[bot]]

Codecov Report

Merging #585 into master will increase coverage by 0.35%. The diff coverage is 92.45%.

@@            Coverage Diff             @@
##           master     #585      +/-   ##
==========================================
+ Coverage   70.74%   71.09%   +0.35%     
==========================================
  Files          55       55              
  Lines        3247     3242       -5     
==========================================
+ Hits         2297     2305       +8     
+ Misses        649      642       -7     
+ Partials      301      295       -6

Impacted Files	Coverage Δ
internal/commands/status.go	83.33% <100%> (+1.7%)	:arrow_up:
internal/commands/uninstall.go	51.02% <100%> (+2%)	:arrow_up:
internal/commands/upgrade.go	60.34% <100%> (+2.01%)	:arrow_up:
internal/commands/install.go	65.71% <100%> (+1.82%)	:arrow_up:
internal/commands/parameters.go	88.5% <89.47%> (+0.41%)	:arrow_up:
internal/commands/cnab.go	74.09% <93.33%> (+0.9%)	:arrow_up:
types/parameters/parameters.go	96.82% <0%> (+4.76%)	:arrow_up:

---

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[codecov[bot]]

Codecov Report

Merging #585 into master will increase coverage by 0.26%. The diff coverage is 92.45%.

@@           Coverage Diff            @@
##           master   #585      +/-   ##
========================================
+ Coverage   70.74%    71%   +0.26%     
========================================
  Files          55     55              
  Lines        3247   3242       -5     
========================================
+ Hits         2297   2302       +5     
+ Misses        649    644       -5     
+ Partials      301    296       -5

Impacted Files	Coverage Δ
internal/commands/uninstall.go	51.02% <100%> (+2%)	:arrow_up:
internal/commands/status.go	83.33% <100%> (+1.7%)	:arrow_up:
internal/commands/upgrade.go	60.34% <100%> (+2.01%)	:arrow_up:
internal/commands/install.go	65.71% <100%> (+1.82%)	:arrow_up:
internal/commands/parameters.go	88.5% <89.47%> (+0.41%)	:arrow_up:
internal/commands/cnab.go	74.09% <93.33%> (+0.9%)	:arrow_up:

---

Continue to review full report at Codecov.

Legend - Click here to learn more Δ = absolute <relative> (impact), ø = not affected, ? = missing data Powered by Codecov. Last update 8d52f6d...8b9556c. Read the comment docs.