Fixed one issue with the podspec file with cocoapods 1.8.2. It's still not liking :git and :tag for some reason when I do a pod spec lint.

Merge pull request #125 from intuit/lwdupont-patch-1

Update podspec with changes

Merge pull request #123 from dcortright/add_activity_type

feat: update xcode version

feat: update sim device iOS version

feat: update pod iOS version to 12

feat: updated travis env iOS version. Removed redundant if check.

Merge branch 'master' into add_activity_type

Merge pull request #122 from LeWarEnds/master

Merge pull request #124 from dcortright/fix_travis_ci

bug: removing ruby vm version

bug: `--no-ri --no-doc` are deprecated

feat: added ability to specify the activity type if needed

correct grammatical mistakes