HACK: more external libs

Author: matiasedgeandnode

packages/horizon/contracts/data-service/libraries/ProvisionTracker.sol

@@ -73,7 +73,7 @@ library ProvisionTracker {
         IHorizonStaking graphStaking,
         address serviceProvider,
         uint32 delegationRatio
-    ) internal view returns (bool) {
+    ) external view returns (bool) {
         uint256 tokensAvailable = graphStaking.getTokensAvailable(serviceProvider, address(this), delegationRatio);
         return self[serviceProvider] <= tokensAvailable;
     }

packages/horizon/contracts/libraries/LinkedList.sol

@@ -72,7 +72,7 @@ library LinkedList {
      * @param self The list metadata
      * @param id The id of the item to add
      */
-    function addTail(List storage self, bytes32 id) internal {
+    function addTail(List storage self, bytes32 id) external {
         require(self.count < MAX_ITEMS, LinkedListMaxElementsExceeded());
         require(id != bytes32(0), LinkedListInvalidZeroId());
         self.tail = id;