improvement(flow): change type checker from flow to typescript

BREAKING CHANGE: Flow is no longer supported

works towards conveyal#318

bin/mastarm

@@ -20,5 +20,5 @@ commander
   )
   .command('test [patterns...]', 'Run tests using Jest')
   // TODO: this should exist
-  .command('typescript', 'Run typescript on the current directory.')
+  .command('ts', 'Run tsc on the current directory.')
   .parse(process.argv)

bin/mastarm-ts

@@ -0,0 +1,3 @@
+#!/bin/bash
+
+$(dirname $0)/../node_modules/.bin/tsc --jsx react

tsconfig.json

@@ -10,7 +10,7 @@
     // "allowJs": true,                             /* Allow javascript files to be compiled. */
     // "checkJs": true,                             /* Report errors in .js files. */
     // "jsx": "preserve",                           /* Specify JSX code generation: 'preserve', 'react-native', 'react', 'react-jsx' or 'react-jsxdev'. */
-    // "declaration": true,                         /* Generates corresponding '.d.ts' file. */
+    "declaration": true,                            /* Generates corresponding '.d.ts' file. */
     // "declarationMap": true,                      /* Generates a sourcemap for each corresponding '.d.ts' file. */
     // "sourceMap": true,                           /* Generates corresponding '.map' file. */
     // "outFile": "./",                             /* Concatenate and emit output to single file. */
@@ -22,7 +22,8 @@
     // "noEmit": true,                              /* Do not emit outputs. */
     // "importHelpers": true,                       /* Import emit helpers from 'tslib'. */
     // "downlevelIteration": true,                  /* Provide full support for iterables in 'for-of', spread, and destructuring when targeting 'ES5' or 'ES3'. */
-    // "isolatedModules": true,                     /* Transpile each file as a separate module (similar to 'ts.transpileModule'). */
+    "isolatedModules": true,                        /* Transpile each file as a separate module (similar to 'ts.transpileModule'). */
+    "emitDeclarationOnly": true,                    /* Babel will convert the file */
 
     /* Strict Type-Checking Options */
     "strict": true,                                 /* Enable all strict type-checking options. */