Pin PyTorch-lightning version to less than 1.2 (#3387)

dependencies/recommended.txt

@@ -6,7 +6,7 @@ torch == 1.6.0+cpu ; sys_platform != "darwin"
 torch == 1.6.0 ; sys_platform == "darwin"
 torchvision == 0.7.0+cpu ; sys_platform != "darwin"
 torchvision == 0.7.0 ; sys_platform == "darwin"
-pytorch-lightning
+pytorch-lightning >= 1.1.1, < 1.2
 onnx
 peewee
 graphviz

dependencies/required.txt

 astor
-hyperopt==0.1.2
+hyperopt == 0.1.2
 json_tricks
 netifaces
 psutil
@@ -9,7 +9,7 @@ responses
 schema
 PythonWebHDFS
 colorama
-scikit-learn>=0.23.2
+scikit-learn >= 0.23.2
 websockets
 filelock
 prettytable

pipelines/fast-test.yml

@@ -132,7 +132,7 @@ stages:
 
     - task: Cache@2
       inputs:
-        key: 'python | "$(Agent.OS)" | dependencies/*.txt'
+        key: 'python | "$(Agent.OS)" | latest | dependencies/*.txt'
         restoreKeys: | 
           python | "$(Agent.OS)"
           python
@@ -141,7 +141,7 @@ stages:
 
     - task: Cache@2
       inputs:
-        key: 'yarn | "$(Agent.OS)" | ts/**/yarn.lock, !**/node_modules/**'
+        key: 'yarn | "$(Agent.OS)" | latest | ts/**/yarn.lock, !**/node_modules/**'
         restoreKeys: |
           yarn | "$(Agent.OS)"
         path: $(YARN_CACHE_FOLDER)