test(sdkVersion): add test for setter / getter of the sdkVersion
test(sdkVersion): add test for setter / getter of the sdkVersion

for #67

bajzarpa/angular-facebook,BenjaminCh/angular-facebook,BenjaminCh/angular-facebook,Ciul/angular-facebook,karthiksekarnz/angular-facebook,karthiksekarnz/angular-facebook,bajzarpa/angular-facebook,ofirgott/angular-facebook,ofirgott/angular-facebook,Ciul/angular-facebook