ci: Update setup-rbmt to cargo-rbmt-0.2.1, bump deps

- Update setup-rbmt action from SHA pin to cargo-rbmt-0.2.1 tag
- Exclude stable toolchain + Cargo-minimal.lock matrix combination
- Bump jsonrpc to 0.20.0
- Bump bitcoind to 0.38.0
- Update stable toolchain to 1.95.0, nightly to floating tag

Author: ValuedMammal

.github/workflows/cont_integration.yml

@@ -29,7 +29,7 @@ jobs:
               uses: Swatinem/rust-cache@c19371144df3bb44fab255c43d04cbc2ab54d1c4 # v2.9.1
 
             - name: Setup cargo-rbmt
-              uses: rust-bitcoin/rust-bitcoin-maintainer-tools/.github/actions/setup-rbmt@6560b728ae6a81af9d92713b630ba26772fbd970
+              uses: rust-bitcoin/rust-bitcoin-maintainer-tools/actions/setup-rbmt@cargo-rbmt-0.2.1
 
             - name: "Run ${{ matrix.task }}"
               run: cargo rbmt ${{ matrix.task }}
@@ -46,6 +46,9 @@ jobs:
                     # Exclude MSRV toolchain + `Cargo-recent.lock`
                     - toolchain: msrv
                       lockfile: recent
+                    # Exclude stable toolchain + `Cargo-minimal.lock`
+                    - toolchain: stable
+                      lockfile: minimal
 
         steps:
             - name: Checkout repository
@@ -57,7 +60,7 @@ jobs:
               uses: Swatinem/rust-cache@c19371144df3bb44fab255c43d04cbc2ab54d1c4 # v2.9.1
 
             - name: Setup cargo-rbmt
-              uses: rust-bitcoin/rust-bitcoin-maintainer-tools/.github/actions/setup-rbmt@6560b728ae6a81af9d92713b630ba26772fbd970
+              uses: rust-bitcoin/rust-bitcoin-maintainer-tools/actions/setup-rbmt@cargo-rbmt-0.2.1
 
             - name: Run tests
               run: cargo rbmt test --toolchain ${{ matrix.toolchain }} --lock-file ${{ matrix.lockfile }}