message: Update Primitives.md:
  Streaming AEAD is now supported in Python.
  AES-GCM-SIV is supported in Java.
  AES-CTR-HMAC-STREAMING is supported in Go.
diff: @@ -30,7 +30,7 @@ describe the main properties of Tink primitives.
  **Primitive** | **Java** | **C++** | **ObjC** | **Go** | **Python**
  ------------------ | -------- | ------- | -------- | ------ | ----------
  AEAD | yes | yes | yes | yes | yes
  -Streaming AEAD | yes | yes | no | yes | no
  +Streaming AEAD | yes | yes | no | yes | yes
  Deterministic AEAD | yes | yes | yes | yes | yes
  MAC | yes | yes | yes | yes | yes
  PRF | yes | yes | no | yes | yes
  @@ -45,7 +45,7 @@ JavaScript is currently under development.
  | Primitive | Java Implementations |
  | ------------------ | --------------------------------------------------------------------------------- |
  -| AEAD | AES-EAX, AES-GCM, AES-CTR-HMAC, KMS Envelope, CHACHA20-POLY1305, XCHACHA-POLY1305 |
  +| AEAD | AES-GCM, AES-GCM-SIV, AES-CTR-HMAC, AES-EAX, KMS Envelope, CHACHA20-POLY1305, XCHACHA-POLY1305 |
  | Streaming AEAD | AES-GCM-HKDF-STREAMING, AES-CTR-HMAC-STREAMING |
  | Deterministic AEAD | AES-SIV |
  | MAC | HMAC-SHA2, AES-CMAC |
  @@ -80,7 +80,7 @@ Hybrid Encryption | ECIES with AEAD and HKDF
  | Primitive | Go Implementations |
  | ------------------ | ------------------------------------------------------------------------ |
  | AEAD | AES-GCM, AES-CTR-HMAC, KMS Envelope, CHACHA20-POLY1305, XCHACHA-POLY1305 |
  -| Streaming AEAD | AES-GCM-HKDF-STREAMING |
  +| Streaming AEAD | AES-GCM-HKDF-STREAMING, AES-CTR-HMAC-STREAMING |
  | Deterministic AEAD | AES-SIV |
  | MAC | HMAC-SHA2, AES-CMAC |
  | PRF | HKDF-SHA2, HMAC-SHA2, AES-CMAC |
  @@ -92,6 +92,7 @@ Hybrid Encryption | ECIES with AEAD and HKDF
  Primitive | Python Implementations
  ------------------ | -----------------------------------------------------------------------------
  AEAD | AES-GCM, AES-CTR-HMAC, AES-EAX, KMS Envelope, XCHACHA20-POLY1305
  +Streaming AEAD | AES-GCM-HKDF-STREAMING, AES-CTR-HMAC-STREAMING
  Deterministic AEAD | AES-SIV
  MAC | HMAC-SHA2, AES-CMAC
  PRF | HKDF-SHA2, HMAC-SHA2, AES-CMAC
  