Windows fixes

- Ignore errors when executing `shutil.rmtree()`, because it seems like it's common to fail when deleting git repos on Windows, and since these are temp files, we don't really care that much there's garbage left. Any good OS should clean the temp folders automatically.
- Always find Jinja templates in `PosixPath` mode.
- Ignore `OSError` when trying to enter a possibly git root directory. This is yielded by Windows when the path is a URL and we don't really care about it.
- Fix some tests with non-windows haradcoded stuff.
- Fix a test that was using a Bash script. Modified to be Python, which should work fine cross-system.
- Do not modify EOL in CI.
- Use python executable in tests instead of python3.
- Update pre-commit versions to include pre-commit/pre-commit-hooks#509.
- Disable autorebasing.

.github/workflows/ci.yml

@@ -23,6 +23,10 @@ jobs:
         python-version: [3.6, 3.7, 3.8]
     runs-on: ${{ matrix.os }}
     steps:
+      - run: git config --global user.name copier-ci
+      - run: git config --global user.email copier@copier
+      - run: git config --global core.autocrlf false
+      - run: git config --global core.eol lf
       - uses: actions/checkout@v2
       - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v1
@@ -45,14 +49,6 @@ jobs:
           key:
             local-${{ env.PY }}|${{ hashFiles('pyproject.toml') }}|${{
             hashFiles('poetry.lock') }}|${{ hashFiles('.pre-commit-config.yaml') }}
-      - run: git config --global user.name copier-ci
-        shell: bash
-      - run: git config --global user.email copier@copier
-        shell: bash
-      - run: git config --global core.autocrlf false
-        shell: bash
-      - run: git config --global core.eol lf
-        shell: bash
       - run: python -m pip install poetry poetry-dynamic-versioning
         shell: bash
       - run: poetry install