test: Bring back skipped cache tests

Author: pgrzesik

test.js

@@ -1386,7 +1386,6 @@ test('py3.7 uses download cache by default option',
     );
     t.end();
   },
-  { skip: true }
 );
 
 test('py3.7 uses download cache by default',
@@ -1401,7 +1400,6 @@ test('py3.7 uses download cache by default',
     );
     t.end();
   },
-  { skip: true }
 );
 
 test(
@@ -1418,8 +1416,7 @@ test(
     );
     t.end();
   },
-  // { skip: !canUseDocker() || brokenOn('win32') }
-  { skip: true }
+  { skip: !canUseDocker() || brokenOn('win32') }
 );
 
 test(
@@ -1437,8 +1434,7 @@ test(
     );
     t.end();
   },
-  // { skip: !canUseDocker() || brokenOn('win32') }
-  { skip: true }
+  { skip: !canUseDocker() || brokenOn('win32') }
 );
 
 test('py3.7 uses static and download cache',
@@ -1462,7 +1458,6 @@ test('py3.7 uses static and download cache',
     );
     t.end();
   },
-  { skip: true }
 );
 
 test(