f Bump testing MSRV to 1.59.0

Author: tnull

.github/workflows/build.yml

@@ -16,8 +16,8 @@ jobs:
                      1.45.2,
                      # 1.47.0 will be the MSRV for no-std builds using hashbrown once core2 is updated
                      1.47.0,
-                     # 1.57.0 is the MSRV for lightning-transaction-sync
-                     1.57.0]
+                     # 1.59.0 is the MSRV for lightning-transaction-sync
+                     1.59.0]
         include:
           - toolchain: stable
             build-net-tokio: true
@@ -69,7 +69,7 @@ jobs:
             build-futures: true
             build-no-std: true
             build-tx-sync: false
-          - toolchain: 1.57.0
+          - toolchain: 1.59.0
             build-net-tokio: false
             build-no-std: false
             build-futures: false