Skip files with valid cache & no violations when auto correcting

[marcelofabri]

Fixes #1554

[SwiftLintBot]

	12 Messages
📖	Linting Aerial with this PR took 0.35s vs 0.33s on master (6% slower)
📖	Linting Alamofire with this PR took 2.18s vs 2.15s on master (1% slower)
📖	Linting Firefox with this PR took 9.46s vs 9.33s on master (1% slower)
📖	Linting Kickstarter with this PR took 12.38s vs 12.18s on master (1% slower)
📖	Linting Moya with this PR took 0.66s vs 0.65s on master (1% slower)
📖	Linting Nimble with this PR took 1.21s vs 1.24s on master (2% faster)
📖	Linting Quick with this PR took 0.4s vs 0.41s on master (2% faster)
📖	Linting Realm with this PR took 1.89s vs 1.86s on master (1% slower)
📖	Linting SourceKitten with this PR took 0.83s vs 0.85s on master (2% faster)
📖	Linting Sourcery with this PR took 1.95s vs 1.95s on master (0% slower)
📖	Linting Swift with this PR took 8.6s vs 8.74s on master (1% faster)
📖	Linting WordPress with this PR took 9.19s vs 9.13s on master (0% slower)

Generated by 🚫 Danger

[codecov-io]

Codecov Report

Merging #1579 into master will decrease coverage by 0.09%.
The diff coverage is 5%.

@@            Coverage Diff            @@
##           master    #1579     +/-   ##
=========================================
- Coverage   84.33%   84.23%   -0.1%     
=========================================
  Files         192      192             
  Lines        9961     9974     +13     
=========================================
+ Hits         8401     8402      +1     
- Misses       1560     1572     +12

Impacted Files	Coverage Δ
...iftlint/Extensions/Configuration+CommandLine.swift	0% <0%> (ø)	⬆️
Source/swiftlint/Commands/AutoCorrectCommand.swift	0% <0%> (ø)	⬆️
Source/SwiftLintFramework/Models/Linter.swift	71.26% <33.33%> (-1.36%)	⬇️

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[jpsim]

Nice. Looks right to me