Bumped pragmas & added emit

contracts/eip20/EIP20.sol

@@ -40,7 +40,7 @@ contract EIP20 is EIP20Interface {
         require(balances[msg.sender] >= _value);
         balances[msg.sender] -= _value;
         balances[_to] += _value;
-        Transfer(msg.sender, _to, _value);
+        emit Transfer(msg.sender, _to, _value); //solhint-disable-line indent, no-unused-vars
         return true;
     }
 
@@ -52,7 +52,7 @@ contract EIP20 is EIP20Interface {
         if (allowance < MAX_UINT256) {
             allowed[_from][msg.sender] -= _value;
         }
-        Transfer(_from, _to, _value);
+        emit Transfer(_from, _to, _value); //solhint-disable-line indent, no-unused-vars
         return true;
     }
 
@@ -62,11 +62,11 @@ contract EIP20 is EIP20Interface {
 
     function approve(address _spender, uint256 _value) public returns (bool success) {
         allowed[msg.sender][_spender] = _value;
-        Approval(msg.sender, _spender, _value);
+        emit Approval(msg.sender, _spender, _value); //solhint-disable-line indent, no-unused-vars
         return true;
     }
 
     function allowance(address _owner, address _spender) public view returns (uint256 remaining) {
         return allowed[_owner][_spender];
-    }   
+    }
 }

contracts/eip20/EIP20Factory.sol

@@ -1,13 +1,13 @@
 import "./EIP20.sol";
 
-pragma solidity ^0.4.18;
+pragma solidity ^0.4.21;
 
 
 contract EIP20Factory {
 
     mapping(address => address[]) public created;
     mapping(address => bool) public isEIP20; //verify without having to do a bytecode check.
-    bytes public EIP20ByteCode; // solhint-disable-line var-name-mixedcase  
+    bytes public EIP20ByteCode; // solhint-disable-line var-name-mixedcase
 
     function EIP20Factory() public {
         //upon creation of the factory, deploy a EIP20 (parameters are meaningless) and store the bytecode provably.
@@ -32,24 +32,24 @@ contract EIP20Factory {
         }
         return true;
     }
-    
-    function createEIP20(uint256 _initialAmount, string _name, uint8 _decimals, string _symbol) 
-        public 
+
+    function createEIP20(uint256 _initialAmount, string _name, uint8 _decimals, string _symbol)
+        public
     returns (address) {
 
         EIP20 newToken = (new EIP20(_initialAmount, _name, _decimals, _symbol));
         created[msg.sender].push(address(newToken));
         isEIP20[address(newToken)] = true;
         //the factory will own the created tokens. You must transfer them.
-        newToken.transfer(msg.sender, _initialAmount); 
+        newToken.transfer(msg.sender, _initialAmount);
         return address(newToken);
     }
 
-    //for now, keeping this internal. Ideally there should also be a live version of this that 
+    //for now, keeping this internal. Ideally there should also be a live version of this that
     // any contract can use, lib-style.
     //retrieves the bytecode at a specific address.
     function codeAt(address _addr) internal view returns (bytes outputCode) {
-        assembly { // solhint-disable-line no-inline-assembly   
+        assembly { // solhint-disable-line no-inline-assembly
             // retrieve the size of the code, this needs assembly
             let size := extcodesize(_addr)
             // allocate output byte array - this could also be done without assembly

contracts/eip20/EIP20Interface.sol

@@ -1,6 +1,6 @@
 // Abstract contract for the full ERC 20 Token standard
 // https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20.md
-pragma solidity ^0.4.18;
+pragma solidity ^0.4.21;
 
 
 contract EIP20Interface {
@@ -44,7 +44,7 @@ contract EIP20Interface {
     /// @return Amount of remaining tokens allowed to spent
     function allowance(address _owner, address _spender) public view returns (uint256 remaining);
 
-    // solhint-disable-next-line no-simple-event-func-name  
-    event Transfer(address indexed _from, address indexed _to, uint256 _value); 
+    // solhint-disable-next-line no-simple-event-func-name
+    event Transfer(address indexed _from, address indexed _to, uint256 _value);
     event Approval(address indexed _owner, address indexed _spender, uint256 _value);
 }