updates podspec: set iOS deployment target to 7.0, set osx deployment target to 10.7, add tvos target
updates podspec: set iOS deployment target to 7.0, set osx deployment target to 10.7, add tvos target

danielctull-forks/OHHTTPStubs,tarbrain/OHHTTPStubs,tarbrain/OHHTTPStubs,HyprMXMobile/OHHTTPStubs,HyprMXMobile/OHHTTPStubs,danielctull-forks/OHHTTPStubs,HyprMXMobile/OHHTTPStubs,danielctull-forks/OHHTTPStubs,tarbrain/OHHTTPStubs,tarbrain/OHHTTPStubs,danielctull-forks/OHHTTPStubs,HyprMXMobile/OHHTTPStubs