Update config.go (#137)

* Update config.go

Changed 2060 to 2060S, Added 2070S, 2080S, 2080TI, TITAN-RTX, and TITAN-V SKUs to select regions, removed -test flag and references.

* Update main.go

removed -test flag references

* Update README.md

removed and replaced -test flag references

* Update config.go

replaced all instances of 2060S with 2060

* Update config.go

missed some testsku references, fixing error 2 on windows64 build

* Update config_test.go

removed references of unknown variable TestSKU

* Update main.go

added -list flag still working on it

* Update config.go

removed s suffix from models to make it less confusing since NVIDIA doesn't carry non-super cards anymore

* Update main.go

Fixing error 2 by removing bool.flag

* Update main.go

removed more -list stuff

* Update main.go

added -list flag to the best of my ability

* Update main.go

added "var list string" line 24

* Update main.go

changed return nil to continue and added } to fix errors

* Update main.go

fixed syntax, hopefully

* Update main.go

testing fix

* Update main.go

trying more fixes

* Update main.go

* Update main.go

* Update main.go

* Update main.go

trying case

* Update config.go

removed empty and titan model tags

* Update main.go

README.md

@@ -62,7 +62,7 @@ chmod +x ./nvidia-clerk-linux
 
 ## Testing
 
-Testing is currenly only supported for the USA region but it should show you what the automated checkout will look like.
+Testing is currently only supported in regions with the 2060 but it should show you what the automated checkout will look like.
 
 ### Windows
 | :memo:        | All commands should be executed inside of cmd.exe |
@@ -121,7 +121,7 @@ set TWILIO_DESTINATION_NUMBER=YOUR_DESITNATION_NUMBER_FOR_NOTIFICATIONS_HERE
 ### Testing
 Testing only works fully with an in-stock card.
 ```shell
-nvidia-clerk-windows.exe -sms -test -model=2060
+nvidia-clerk-windows.exe -sms -model=2060
 ```
 
 ### Usage
@@ -139,7 +139,7 @@ set DISCORD_WEBHOOK_URL=DISCORD_WEBHOOK_URL_HERE
 
 ### Testing
 ```Batchfile
-./nvidia-clerk-windows.exe -discord -test -model=2060
+./nvidia-clerk-windows.exe -discord -model=2060
 ```
 
 ### Usage
@@ -160,7 +160,7 @@ set TWITTER_ACCESS_SECRET=YOUR_TWITTER_ACCESS_SECRET_HERE
 
 ### Testing
 ```Batchfile
-./nvidia-clerk-windows.exe -twitter -test -model=2060
+./nvidia-clerk-windows.exe -twitter -model=2060
 ```
 
 ### Usage
@@ -184,7 +184,7 @@ set TELEGRAM_CHAT_ID=YOUR_TELEGRAM_CHAT_ID_HERE
 
 ### Testing
 ```Batchfile
-./nvidia-clerk-windows.exe -telegram -test -model=2060
+./nvidia-clerk-windows.exe -telegram -model=2060
 ```
 
 ### Usage