feat(portmapper)!: update to [email protected] and MSRV bump to 1.81

## Description

- `portmapper`: updates `iroh-metrics` to `0.30.0`
 
## Breaking Changes

- `portmapper`:  `iroh-metrics` to `0.30.0`
- MSRV is now `1.81`

Author: dignifiedquire

.github/workflows/ci.yaml

@@ -16,7 +16,7 @@ env:
   RUST_BACKTRACE: 1
   RUSTFLAGS: -Dwarnings
   RUSTDOCFLAGS: -Dwarnings
-  MSRV: "1.76"
+  MSRV: "1.81"
   SCCACHE_CACHE_SIZE: "10G"
   IROH_FORCE_STAGING_RELAYS: "1"
 
@@ -204,7 +204,7 @@ jobs:
     - uses: actions/checkout@v4
     - uses: dtolnay/rust-toolchain@master
       with:
-        toolchain: nightly-2024-05-02
+        toolchain: nightly-2024-11-30
     - name: Install sccache
       uses: mozilla-actions/[email protected]
 

.github/workflows/docs.yaml

@@ -32,7 +32,7 @@ jobs:
     - uses: actions/checkout@v4
     - uses: dtolnay/rust-toolchain@master
       with:
-        toolchain: nightly-2024-05-02
+        toolchain: nightly-2024-11-30
     - name: Install sccache
       uses: mozilla-actions/[email protected]
 
@@ -68,6 +68,6 @@ jobs:
         comment-id: ${{ steps.fc.outputs.comment-id }}
         body: |
           Documentation for this PR has been generated and is available at: https://${{ github.repository_owner }}.github.io/${{ github.event.repository.name }}/${{ env.PREVIEW_PATH }}/iroh_gossip/
-          
+
           Last updated: ${{ env.TIMESTAMP }}
-        edit-mode: replace
+        edit-mode: replace