Updated to bats-core v1.2.0

Also updated the bats-file remote URL.

Author: nwinkler

.gitmodules

@@ -1,6 +1,7 @@
 [submodule "test_lib/bats-core"]
 	path = test_lib/bats-core
 	url = https://github.com/bats-core/bats-core
+	branch = tags/v1.2.0
 [submodule "test_lib/bats-support"]
 	path = test_lib/bats-support
 	url = https://github.com/bats-core/bats-support
@@ -11,5 +12,5 @@
 	branch = tags/v2.0.0
 [submodule "test_lib/bats-file"]
 	path = test_lib/bats-file
-	url = https://github.com/tralston/bats-file
+	url = https://github.com/bats-core/bats-file
 	branch = tags/v0.3.0