Modernize

Fixes a number of outdated issues, as well as a bug that caused the TAP formatter to always fail.

Author: toroidal-code

.gitmodules

@@ -1,6 +1,3 @@
 [submodule "include/cxx-prettyprint"]
 	path = include/cxx-prettyprint
-	url = https://github.com/toroidal-code/cxx-prettyprint.git
-[submodule "include/optional"]
-	path = include/optional
-	url = https://github.com/akrzemi1/Optional
+	url = https://github.com/toroidal-code/cxx-prettyprint.git

.vscode/launch.json

@@ -0,0 +1,14 @@
+{
+  "version": "0.2.0",
+  "configurations": [
+    {
+      "type": "lldb",
+      "request": "launch",
+      "name": "Launch",
+      "program": "${workspaceFolder}/build/spec/spec_runner.exe",
+      "args": [],
+      "cwd": "${workspaceFolder}"
+    },
+  ],
+  "compounds": []
+}

.vscode/settings.json

@@ -0,0 +1,8 @@
+{
+  "files.associations": {
+    "*.scons": "python",
+    "regex": "cpp",
+    "xutility": "cpp",
+    "optional": "cpp"
+  }
+}