trigger v1.6.0rel build

Author: Jeff Whitaker

.github/workflows/build-wheels.yml

@@ -42,7 +42,7 @@ jobs:
             os: macos-10.15
             platform: x86_64
     env:
-      BUILD_COMMIT: v1.5.2rel
+      BUILD_COMMIT: v1.6.0rel
       MB_ML_VER: 2014
       REPO_DIR: cftime
       PKG_NAME: cftime

.github/workflows/build-windows-wheels.yml

@@ -29,7 +29,7 @@ jobs:
     env:
       REPO_DIR: cftime
       PKG_NAME: cftime
-      BUILD_COMMIT: v1.5.2rel
+      BUILD_COMMIT: v1.6.0rel
       UNICODE_WIDTH: 32
       MB_PYTHON_VERSION: ${{ matrix.python-version }}
       TRAVIS_PYTHON_VERSION: ${{ matrix.python-version }}