Set license field in package.json to BSD-3-Clause

[nbryant]

Please refer to our Commit Guidelines for documenting changes.

Changes proposed in this pull request:

Acceptance Criteria

General

• Tested on desktop (see supported browsers)
• Tested on mobile (for responsive or mobile-specific features)
• Confirm Accessibility
• Confirm RTL

Feature

• Reference User Story work item number in description
• Add usage examples
• Add documentation for new usage guidelines
• Add tests to test new components and implementation usage
• Add component specific Release notes mentioning the changes
• If feature requires the implementor to move to a new version, please provide a migration description in the component specific Release notes

Fix

• Reference Bug work item number in description
• Add tests to ensure bug does not happen again
• Add component specific Release notes mentioning the changes

Design Changes

• Add component specific Release notes mentioning the changes
• If change requires the implementor to move to a new version, please provide a migration description in the component specific Release notes

Deprecated

• If css selector is being deprecated, apply the @deprecate annotation to selector comment block

   /**
    * @selector .slds-bar
    * @deprecated
    */
   .slds-bar { ... }

• If css selector is being deprecated, move deprecated code to _deprecate.scss file and wrap in deprecate mixin.

• Provide deprecate mixin with version code will become deprecated and a brief description for what the code is being deprecated for.

   @include deprecate('4.0.0', 'Please use slds-foo instead of slds-bar') {
      .slds-bar { ... }
   }

[salesforce-cla]

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[Dottenpixel]

Hi @nbryant, I got SLDS 2.18.0 up here earlier today with the fix to the license value in 73c43b3. Thank you for your contribution!