Fix conan version to 1.x because 2.0 doesn't work for us yet

.github/workflows/main.yaml

@@ -256,7 +256,7 @@ jobs:
           if [[ "${{matrix.os}}" == "ubuntu-18.04" ]]; then
             python3 -m pip install setuptools
           fi
-          python3 -m pip install conan
+          python3 -m pip install conan==1.59
       - name: Save pip cache
         # note: this access key has write access to the cache. This can't run on PRs.
         if: ${{github.event_name == 'push' }}
@@ -461,7 +461,7 @@ jobs:
         shell: bash
         run: |
           # Using "python3 -m pip" instead of "pip3" to make sure we get the same pip that we queried the cache dir for the Github Cache action
-          python3 -m pip install conan
+          python3 -m pip install conan==1.59
       - name: Save pip cache
         # note: this access key has write access to the cache. This can't run on PRs.
         if: ${{github.event_name == 'push' }}

README.md

@@ -85,7 +85,7 @@ Requirements
   - GCC version >= 7 or Clang >= 7
   - CMake version >= 3.10
   - pkg-config (on Unix)
-  - Conan package manager
+  - Conan package manager (version 1.x)
   - libcurl4 (including development headers)
   - SSL development libraries (including development headers, e.g. libssl-dev)
   - libFUSE version >= 2.8.6 (including development headers), on Mac OS X instead install macFUSE from https://osxfuse.github.io/
@@ -96,15 +96,15 @@ You can use the following commands to install these requirements
 
         # Ubuntu
         $ sudo apt install git g++ cmake make pkg-config libcurl4-openssl-dev libssl-dev libfuse-dev python python3-pip
-        $ sudo pip3 install conan
+        $ sudo pip3 install conan==1.59
 
         # Fedora
         $ sudo dnf install git gcc-c++ cmake make pkgconf libcurl-devel openssl-devel fuse-devel python python3-pip
-        $ sudo pip3 install conan
+        $ sudo pip3 install conan==1.59
 
         # Macintosh
         $ brew install cmake pkg-config openssl libomp macfuse
-        $ sudo pip3 install conan
+        $ sudo pip3 install conan==1.59
 
 Build & Install
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