[EASY] Use full precision in CoinGecko (#2852)

# Description
Use full precision in CoinGecko so we do the calculations with all the
possible decimals.

# Changes
- Use full precision in CoinGecko

## How to test
1. Unit test

crates/shared/src/price_estimation/native/coingecko.rs

@@ -58,7 +58,8 @@ impl NativePriceEstimating for CoinGecko {
             let mut url = crate::url::join(&self.base_url, &self.chain);
             url.query_pairs_mut()
                 .append_pair("contract_addresses", &format!("{:#x}", token))
-                .append_pair("vs_currencies", "eth");
+                .append_pair("vs_currencies", "eth")
+                .append_pair("precision", "full");
             let mut builder = self.client.get(url.clone());
             if let Some(ref api_key) = self.api_key {
                 builder = builder.header(Self::AUTHORIZATION, api_key)