deprecations: replace all TBDs with 0.30.0

We accidentally released 0.30.0 and 0.31.0 with "in future"
deprecations. Most users will not see these since the lint for them is
different from the normal deprecation warning (and it's undocumented
except to say that we "should not use" future deprecations, even though
it works and there is no alternative).

Author: apoelstra

src/ecdh.rs

@@ -64,7 +64,7 @@ impl SharedSecret {
     pub fn from_bytes(bytes: [u8; SHARED_SECRET_SIZE]) -> SharedSecret { SharedSecret(bytes) }
 
     /// Creates a shared secret from `bytes` slice.
-    #[deprecated(since = "TBD", note = "Use `from_bytes` instead.")]
+    #[deprecated(since = "0.30.0", note = "Use `from_bytes` instead.")]
     #[inline]
     pub fn from_slice(bytes: &[u8]) -> Result<SharedSecret, Error> {
         match bytes.len() {

src/key.rs

@@ -219,7 +219,7 @@ impl SecretKey {
     /// use secp256k1::SecretKey;
     /// let sk = SecretKey::from_slice(&[0xcd; 32]).expect("32 bytes, within curve order");
     /// ```
-    #[deprecated(since = "TBD", note = "Use `from_byte_array` instead.")]
+    #[deprecated(since = "0.30.0", note = "Use `from_byte_array` instead.")]
     #[inline]
     pub fn from_slice(data: &[u8]) -> Result<SecretKey, Error> {
         match <[u8; constants::SECRET_KEY_SIZE]>::try_from(data) {
@@ -1215,7 +1215,7 @@ impl XOnlyPublicKey {
     ///
     /// Returns [`Error::InvalidPublicKey`] if the length of the data slice is not 32 bytes or the
     /// slice does not represent a valid Secp256k1 point x coordinate.
-    #[deprecated(since = "TBD", note = "Use `from_byte_array` instead.")]
+    #[deprecated(since = "0.30.0", note = "Use `from_byte_array` instead.")]
     #[inline]
     pub fn from_slice(data: &[u8]) -> Result<XOnlyPublicKey, Error> {
         match <[u8; constants::SCHNORR_PUBLIC_KEY_SIZE]>::try_from(data) {

src/lib.rs

@@ -255,7 +255,7 @@ impl Message {
     ///
     /// [secure signature]: https://twitter.com/pwuille/status/1063582706288586752
     #[inline]
-    #[deprecated(since = "TBD", note = "use from_digest instead")]
+    #[deprecated(since = "0.30.0", note = "use from_digest instead")]
     pub fn from_digest_slice(digest: &[u8]) -> Result<Message, Error> {
         Ok(Message::from_digest(digest.try_into().map_err(|_| Error::InvalidMessage)?))
     }

src/schnorr.rs

@@ -78,7 +78,7 @@ impl Signature {
     pub fn from_byte_array(sig: [u8; constants::SCHNORR_SIGNATURE_SIZE]) -> Self { Self(sig) }
 
     /// Creates a `Signature` directly from a slice.
-    #[deprecated(since = "TBD", note = "Use `from_byte_array` instead.")]
+    #[deprecated(since = "0.30.0", note = "Use `from_byte_array` instead.")]
     #[inline]
     pub fn from_slice(data: &[u8]) -> Result<Signature, Error> {
         match data.len() {