Compile all build dependencies from scratch in windows CI

This is to workaround linking issues with catch2, where symbols for
CHECK/REQUIREs comparing std::string_view are missing because a conan
binary built under C++14 is being used instead of one built using C++17.

.github/workflows/windows-ci.yml

@@ -131,7 +131,7 @@ jobs:
       - name: Install build dependencies
         run: |
           conan install .                                           \
-             --build=missing                                        \
+             --build="*"                                            \
              -pr:h default                                          \
              -pr:b default                                          \
              -s:h "compiler=${{ matrix.compiler-name }}"            \