Upgrade WPILib and upgraded compilers to C++17

I haven't touched the CTRE libraries yet, although they may need to be
upgraded as well.

Note that this change makes it so that you need either Ubuntu 18.04 or
later or debian buster or later in order to build the code (you may be
able to build code for the roborio on older operating systems, but
running the tests will not work normally).

Change-Id: I0cfa37fe37f830edde6d305e1f50414c369098e4
diff --git a/third_party/libjpeg/BUILD b/third_party/libjpeg/BUILD
index 2f3a812..f5b2d12 100644
--- a/third_party/libjpeg/BUILD
+++ b/third_party/libjpeg/BUILD
@@ -65,6 +65,7 @@
         "-Wno-switch-enum",
         "-Wno-format-nonliteral",
         "-Wno-unused-parameter",
+        "-Wno-implicit-fallthrough",
     ] + select({
         "//tools:cpu_roborio": [
             # This is sketchy under the standard, but it's a known issue with