docs(README): integrate crates.io badges

Signed-off-by: Joseph Livesey <[email protected]>

Author: suchapalaver

README.md

@@ -1,5 +1,13 @@
 # Timeline Aggregation Protocol (TAP)
 
+| Crate                  | Version Badge                                                                                                      |
+| ---------------------- | ------------------------------------------------------------------------------------------------------------------ |
+| **tap_aggregator**     | [![Crates.io](https://img.shields.io/crates/v/tap_aggregator.svg)](https://crates.io/crates/tap_aggregator)        |
+| **tap_core**           | [![Crates.io](https://img.shields.io/crates/v/tap_core.svg)](https://crates.io/crates/tap_core)                    |
+| **tap_eip712_message** | [![Crates.io](https://img.shields.io/crates/v/tap_eip712_message.svg)](https://crates.io/crates/tap_eip712_message)|
+| **tap_graph**          | [![Crates.io](https://img.shields.io/crates/v/tap_graph.svg)](https://crates.io/crates/tap_graph)                  |
+| **tap_receipt**        | [![Crates.io](https://img.shields.io/crates/v/tap_receipt.svg)](https://crates.io/crates/tap_receipt)              |
+
 ## Overview
 
 The TAP (Timeline Aggregation Protocol) facilitates a series of payments from a