Merge pull request #116 from nonlin-lin-chaos-order-etc-etal/i2pd_release_2_57_0

Update to i2pd 2.57.0 tag

Author: orignal

.github/workflows/build.yml

@@ -8,17 +8,11 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-20.04, ubuntu-22.04]
+        os: [ubuntu-22.04]
     steps:
     - uses: actions/checkout@v2
       with:
         submodules: 'recursive'
-    - name: Install packages on Ubuntu 20.04
-      if: matrix.os == 'ubuntu-20.04'
-      run: |
-        sudo add-apt-repository ppa:mhier/libboost-latest
-        sudo apt-get update
-        sudo apt-get install build-essential qt5-default libqt5gui5 libboost1.74-dev libminiupnpc-dev libssl-dev zlib1g-dev
     - name: Install packages on Ubuntu 22.04
       if: matrix.os == 'ubuntu-22.04'
       run: |