TST: Update Conda CI build to use nightly pandas packages. (#254)

* TST: Update Conda CI build to use nightly pandas packages.

Remove unused git-based pip requirements file.

* Restore non-nightly conda build.

Author: tswast

.circleci/config.yml

@@ -47,6 +47,16 @@ jobs:
       - checkout
       - run: ci/config_auth.sh
       - run: ci/run_conda.sh
+  "conda-3.7-NIGHTLY":
+    docker:
+      - image: continuumio/miniconda3
+    environment:
+      PYTHON: "3.7"
+      PANDAS: "NIGHTLY"
+    steps:
+      - checkout
+      - run: ci/config_auth.sh
+      - run: ci/run_conda.sh
 
 workflows:
   version: 2
@@ -56,4 +66,5 @@ workflows:
       - "pip-3.6"
       - "pip-3.7"
       - lint
-      - "conda-3.6-0.20.1"
+      - "conda-3.6-0.20.1"
+      - "conda-3.7-NIGHTLY"

ci/requirements-3.6-MASTER.pip

@@ -0,0 +1,7 @@
+pydata-google-auth
+google-cloud-bigquery==1.10.0
+pytest
+pytest-cov
+codecov
+coverage
+flake8

ci/requirements-3.7-NIGHTLY.conda

@@ -11,7 +11,7 @@ conda update -q conda
 conda info -a
 conda create -q -n test-environment python=$PYTHON
 source activate test-environment
-if [[ "$PANDAS" == "MASTER" ]]; then
+if [[ "$PANDAS" == "NIGHTLY" ]]; then
   conda install -q numpy pytz python-dateutil;
   PRE_WHEELS="https://7933911d6844c6c53a7d-47bd50c35cd79bd838daf386af554a83.ssl.cf2.rackcdn.com";
   pip install --pre --upgrade --timeout=60 -f $PRE_WHEELS pandas;