Fix some broken links (#207)

Author: jarrodwatts

contracts/eip/ERC721A.sol

@@ -12,7 +12,7 @@ import "../lib/TWStrings.sol";
 import "./ERC165.sol";
 
 /**
- * @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
+ * @dev Implementation of [ERC721](https://eips.ethereum.org/EIPS/eip-721) Non-Fungible Token Standard, including
  * the Metadata extension. Built to optimize for lower gas during batch mints.
  *
  * Assumes serials are sequentially minted starting at _startTokenId() (defaults to 0, e.g. 0, 1, 2, 3..).

contracts/eip/interface/IERC165.sol

@@ -5,7 +5,7 @@ pragma solidity ^0.8.0;
 
 /**
  * @dev Interface of the ERC165 standard, as defined in the
- * https://eips.ethereum.org/EIPS/eip-165[EIP].
+ * [EIP](https://eips.ethereum.org/EIPS/eip-165).
  *
  * Implementers can declare support of contract interfaces, which can then be
  * queried by others ({ERC165Checker}).
@@ -16,7 +16,7 @@ interface IERC165 {
     /**
      * @dev Returns true if this contract implements the interface defined by
      * `interfaceId`. See the corresponding
-     * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
+     * [EIP section](https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified)
      * to learn more about how these ids are created.
      *
      * This function call must use less than 30 000 gas.

contracts/lib/TWAddress.sol

@@ -45,7 +45,7 @@ library TWAddress {
      * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
      * `recipient`, forwarding all available gas and reverting on errors.
      *
-     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
+     * [EIP1884](https://eips.ethereum.org/EIPS/eip-1884) increases the gas cost
      * of certain opcodes, possibly making contracts go over the 2300 gas limit
      * imposed by `transfer`, making them unable to receive funds via
      * `transfer`. {sendValue} removes this limitation.

contracts/lib/TWBitMaps.sol

@@ -4,7 +4,7 @@ pragma solidity ^0.8.0;
 
 /**
  * @dev Library for managing uint256 to bool mapping in a compact and efficient way, providing the keys are sequential.
- * Largelly inspired by Uniswap's https://github.com/Uniswap/merkle-distributor/blob/master/contracts/MerkleDistributor.sol[merkle-distributor].
+ * Largely inspired by Uniswap's [merkle-distributor](https://github.com/Uniswap/merkle-distributor/blob/master/contracts/MerkleDistributor.sol).
  */
 library TWBitMaps {
     struct BitMap {