libs/common: refactor libs/common 01 (#4230)

* libs/common: Refactor libs/common 01

Signed-off-by: Marko Baricevic <marbar3778@yahoo.com>

* regenerate proto files, move intslice to where its used

* update kv.KVPair(s) to kv.Pair(s)

* add changelog entry

* make intInSlice private

docs/app-dev/app-development.md

@@ -187,7 +187,7 @@ func (app *KVStoreApplication) DeliverTx(req types.RequestDeliverTx) types.Respo
 	events := []types.Event{
 		{
 			Type: "app",
-			Attributes: []cmn.KVPair{
+			Attributes: []kv.Pair{
 				{Key: []byte("creator"), Value: []byte("Cosmoshi Netowoko")},
 				{Key: []byte("key"), Value: key},
 			},

docs/app-dev/indexing-transactions.md

@@ -76,10 +76,10 @@ func (app *KVStoreApplication) DeliverTx(req types.RequestDeliverTx) types.Resul
     events := []abci.Event{
         {
             Type: "transfer",
-            Attributes: cmn.KVPairs{
-                cmn.KVPair{Key: []byte("sender"), Value: []byte("Bob")},
-                cmn.KVPair{Key: []byte("recipient"), Value: []byte("Alice")},
-                cmn.KVPair{Key: []byte("balance"), Value: []byte("100")},
+            Attributes: kv.Pairs{
+                kv.Pair{Key: []byte("sender"), Value: []byte("Bob")},
+                kv.Pair{Key: []byte("recipient"), Value: []byte("Alice")},
+                kv.Pair{Key: []byte("balance"), Value: []byte("100")},
             },
         },
     }