fix: add amount to FormattedPaymentChannel type (#989)

* fix: add amount to FormattedPaymentChannel type

* fix: ignore package-lock.json

.gitignore

@@ -1,5 +1,9 @@
 # .gitignore
 
+# Ignore package locks other than Yarn.
+package-lock.json
+npm-shrinkwrap.json
+
 # Ignore vim swap files.
 *.swp
 

src/ledger/parse/payment-channel.ts

@@ -4,6 +4,7 @@ import {PayChannelLedgerEntry} from '../../common/types/objects'
 
 export type FormattedPaymentChannel = {
   account: string,
+  amount: string,
   balance: string,
   publicKey: string,
   destination: string,