Update version references to 0.2.0, mark spec as stable

Author: jaschadub

AGENTPIN_TECHNICAL_SPECIFICATION.md

@@ -1,9 +1,9 @@
 # AgentPin Technical Specification
 
-**Protocol Version:** 0.1.0-draft  
-**Status:** Draft  
-**Author:** Jascha Wanger / [ThirdKey.ai](https://thirdkey.ai)  
-**Date:** 2026-01-31  
+**Protocol Version:** 0.2.0
+**Status:** Stable
+**Author:** Jascha Wanger / [ThirdKey.ai](https://thirdkey.ai)
+**Date:** 2026-02-16  
 **License:** MIT  
 
 ---

README.md

@@ -43,7 +43,7 @@ agentpin verify --credential <jwt>
 
 ```toml
 [dependencies]
-agentpin = { version = "0.1", features = ["fetch"] }
+agentpin = { version = "0.2", features = ["fetch"] }
 ```
 
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