Add for_where rule

[marcelofabri]

Fixes #1228

[SwiftLintBot]

	2 Warnings
⚠️	This PR introduced a violation in swift: /stdlib/public/core/EmptyCollection.swift#L147:10: warning: Missing Docs Violation: Public declarations should be documented. (missing_docs)
⚠️	This PR introduced a violation in firefox-ios: /Storage/SQL/SQLiteRemoteClientsAndTabs.swift#L340:12: warning: Missing Docs Violation: Public declarations should be documented. (missing_docs)

	14 Messages
📖	Linting WordPress-iOS with this PR took 16.02s vs 15.52s on master (3% slower)
📖	This PR fixed a violation in Nimble: /Sources/Nimble/Matchers/MatcherFunc.swift#L54:12: warning: Missing Docs Violation: Public declarations should be documented. (missing_docs)
📖	Linting Alamofire with this PR took 3.91s vs 4.54s on master (13% faster)
📖	Linting swift with this PR took 14.31s vs 16.17s on master (11% faster)
📖	Linting Aerial with this PR took 0.65s vs 0.58s on master (12% slower)
📖	Linting SourceKitten with this PR took 1.69s vs 1.89s on master (10% faster)
📖	Linting Sourcery with this PR took 3.0s vs 3.34s on master (10% faster)
📖	This PR fixed a violation in Nimble: /Sources/Nimble/Matchers/MatcherFunc.swift#L46:12: warning: Missing Docs Violation: Public declarations should be documented. (missing_docs)
📖	Linting Moya with this PR took 0.57s vs 0.59s on master (3% faster)
📖	Linting firefox-ios with this PR took 24.72s vs 24.76s on master (0% faster)
📖	Linting Nimble with this PR took 2.52s vs 2.27s on master (11% slower)
📖	Linting Quick with this PR took 0.75s vs 0.73s on master (2% slower)
📖	Linting realm-cocoa with this PR took 3.93s vs 3.67s on master (7% slower)
📖	Linting ios-oss with this PR took 21.12s vs 23.86s on master (11% faster)

Generated by 🚫 danger

[codecov-io]

Current coverage is 82.00% (diff: 93.02%)

Merging #1260 into master will increase coverage by 0.05%

@@             master      #1260   diff @@
==========================================
  Files           168        169     +1   
  Lines          8341       8384    +43   
  Methods           0          0          
  Messages          0          0          
  Branches          0          0          
==========================================
+ Hits           6835       6875    +40   
- Misses         1506       1509     +3   
  Partials          0          0          

Powered by Codecov. Last update 118e387...c616d80

[jpsim]

Isn't it odd that OSSCheck didn't uncover any violations of this?

[marcelofabri]

Isn't it odd that OSSCheck didn't uncover any violations of this?

I think it's because of #1248

[jpsim]

Merged in f0c8fba. Thanks!