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/aos/events/shm_event_loop.h b/aos/events/shm_event_loop.h
index e859201..577a98d 100644
--- a/aos/events/shm_event_loop.h
+++ b/aos/events/shm_event_loop.h
@@ -59,10 +59,10 @@
 
   void SetRuntimeRealtimePriority(int priority) override;
 
-  void set_name(const absl::string_view name) override {
+  void set_name(const std::string_view name) override {
     name_ = std::string(name);
   }
-  const absl::string_view name() const override { return name_; }
+  const std::string_view name() const override { return name_; }
 
   int priority() const { return priority_; }