API-{C,Rust}.md: Note which version new functions were added

Signed-off-by: Andrew Clayton <a.clayton@nginx.com>

Author: ac000

API-C.md

@@ -668,6 +668,8 @@ This function returns the total length of the content that was sent to the
 WebAssembly module so far. Remember, a single HTTP request may be split over
 several calls to luw_request_handler().
 
+_Version: 0.2.0_
+
 ### luw_http_is_tls
 
 ```C

API-Rust.md

@@ -604,6 +604,8 @@ pub fn uwr_get_http_content_str(ctx: *const luw_ctx_t) -> &'static str;
 
 Same as above but returns a Rust str.
 
+_Version: 0.2.0_
+
 ### uwr_get_http_content_len
 
 ```Rust
@@ -633,6 +635,8 @@ This function returns the total length of the content that was sent to the
 WebAssembly module so far. Remember, a single HTTP request may be split over
 several calls to luw_request_handler().
 
+_Version: 0.2.0_
+
 ### uwr_http_is_tls
 
 ```Rust
@@ -886,6 +890,8 @@ written as
 uwr_http_add_header_content_type(ctx, "text/plain");
 ```
 
+_Version: 0.2.0_
+
 ### uwr_http_add_header_content_len
 
 ```Rust
@@ -903,6 +909,8 @@ uwr_http_add_header_content_len(ctx);
 This function uses [uwr_get_response_data_size](#uwr_get_response_data_size)
 internally to get the size of the response data.
 
+_Version: 0.2.0_
+
 ### uwr_http_send_headers
 
 ```Rust