Allow this to be actually used in Carthage.

[kennytm]

• Do not integrate CocoaPods with the target PasswordTextField. This is unnecessary as the library itself has no dependencies.
• Update the test dependencies Quick and Nimble to the latest published versions.

Without this commit, using PasswordTextField in Carthage will fail with the following message, because PODS_ROOT is not defined in Carthage.

*** Building scheme "PasswordTextField" in PasswordTextField.xcworkspace
** BUILD FAILED **


The following build commands failed:
	PhaseScriptExecution [CP]\ Check\ Pods\ Manifest.lock /Users/kennytm/Library/Developer/Xcode/DerivedData/PasswordTextField-bpvizxblfrzvlofkzgiyvwgfekxy/Build/Intermediates/PasswordTextField.build/Release-iphoneos/PasswordTextField.build/Script-66B4D3588EF01B594E66967A.sh
(1 failure)
error: The sandbox is not in sync with the Podfile.lock. Run 'pod install' or update your CocoaPods installation.
A shell task (/usr/bin/xcrun xcodebuild -workspace /path/to/my/project/Carthage/Checkouts/PasswordTextField/PasswordTextField.xcworkspace -scheme PasswordTextField -configuration Release -sdk iphoneos ONLY_ACTIVE_ARCH=NO BITCODE_GENERATION_MODE=bitcode CODE_SIGNING_REQUIRED=NO CODE_SIGN_IDENTITY= CARTHAGE=YES clean build) failed with exit code 65:
** BUILD FAILED **


The following build commands failed:
	PhaseScriptExecution [CP]\ Check\ Pods\ Manifest.lock /Users/kennytm/Library/Developer/Xcode/DerivedData/PasswordTextField-bpvizxblfrzvlofkzgiyvwgfekxy/Build/Intermediates/PasswordTextField.build/Release-iphoneos/PasswordTextField.build/Script-66B4D3588EF01B594E66967A.sh
(1 failure)

[codecov-io]

Current coverage is 80.98% (diff: 100%)

Merging #13 into master will not change coverage

@@             master        #13   diff @@
==========================================
  Files            10         10          
  Lines           263        263          
  Methods           0          0          
  Messages          0          0          
  Branches          0          0          
==========================================
  Hits            213        213          
  Misses           50         50          
  Partials          0          0          

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[PiXeL16]

Nice! Thanks! 🎉