False positive in array_init rule when using map that doesn't take a closure

[marcelofabri]

New Issue Checklist

• Updated SwiftLint to the latest version
• I searched for existing GitHub issues

Bug Report

$ Pods/SwiftLint/swiftlint lint --path file.swift                                         
Loading configuration from '.swiftlint.yml'
Linting Swift files at path file.swift
Linting 'file.swift' (1/1)
file.swift:1:17: warning: Array Init Violation: Prefer using Array(seq) than seq.map { $0 } to convert a sequence into an Array. (array_init)
Done linting! Found 1 violation, 0 serious in 1 file.

Environment

• SwiftLint version (run swiftlint version to be sure)? 0.23.0
• Installation method used (Homebrew, CocoaPods, building from source, etc)? CocoaPods
• Paste your configuration file:

opt_in_rules:
  - array_init

• Are you using nested configurations?
  If so, paste their relative paths and respective contents.

No

• Which Xcode version are you using (check xcode-select -p)?

Xcode 9

• Do you have a sample that shows the issue? Run echo "[string here]" | swiftlint lint --no-cache --use-stdin --enable-all-rules
  to quickly test if your example is really demonstrating the issue. If your example is more
  complex, you can use swiftlint lint --path [file here] --no-cache --enable-all-rules.

foo.something { RouteMapper.map($0) }