Merge #22: Fix deprecation version of get_header

3a93ee5 Fix deprecation version of `get_header` (Elias Rohrer)

Pull request description:

  In #17, we deprecated `get_header` and assumed the next version would be 0.1.2, but it turned out to be 0.2.

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Tree-SHA512: 2b552730054def1dde12358527ef4c84fc225fe3359b41315318952162c8a28065620259212000bcd28364204f26b21f0e3586d5d231b11bf175db4954b813f7

Author: notmandatory

src/async.rs

@@ -114,7 +114,7 @@ impl AsyncClient {
     }
 
     #[deprecated(
-        since = "0.1.2",
+        since = "0.2.0",
         note = "Deprecated to improve alignment with Esplora API. Users should use `get_block_hash` and `get_header_by_hash` methods directly."
     )]
     /// Get a [`BlockHeader`] given a particular block height.

src/blocking.rs

@@ -128,7 +128,7 @@ impl BlockingClient {
 
     /// Get a [`BlockHeader`] given a particular block height.
     #[deprecated(
-        since = "0.1.2",
+        since = "0.2.0",
         note = "Deprecated to improve alignment with Esplora API. Users should use `get_block_hash` and `get_header_by_hash` methods directly."
     )]
     pub fn get_header(&self, block_height: u32) -> Result<BlockHeader, Error> {