feat: Add verbose option to rollup & svelte

[tivac]

Add new verbose option to rollup & svelte packages, also adds tests for the existing verbose option to processor package.

Fixes #520, though without using npmlog because it's more complicated than I need right now.

[codecov]

Codecov Report

Merging #521 into master will increase coverage by 0.02%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #521      +/-   ##
==========================================
+ Coverage   98.84%   98.87%   +0.02%     
==========================================
  Files          39       40       +1     
  Lines         869      890      +21     
  Branches      131      134       +3     
==========================================
+ Hits          859      880      +21     
  Misses         10       10

Impacted Files	Coverage Δ
packages/svelte/svelte.js	100% <ø> (ø)	⬆️
packages/processor/processor.js	100% <100%> (ø)	⬆️
packages/svelte/src/markup.js	100% <100%> (ø)	⬆️
packages/test-utils/logs.js	100% <100%> (ø)
packages/rollup/rollup.js	98.94% <100%> (+0.09%)	⬆️

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