fix: Don't mix generated declaration files with ts source files.

TypeScript seems to get confused when a .d.ts and a .ts file of the same
basename are in the same directory. This causes a consuming project to
think it needs to compile the *.ts files that are imported from the
index.d.ts file.

Also did some other maintainance while I was here:
* use yarn instead of npm for script execution.
* enable sourcemaps so consuming projects will see the right source when
  navigating code and so debugging sessions can navigate the typescript code.
* Update engine support to exlude node 11 now that 12 is released.

.gitignore

@@ -1,5 +1,6 @@
 node_modules
 tmp
+lib
 *.js
 *.d.ts
-!types/
+!types/

package.json

@@ -5,22 +5,22 @@
   "main": "lib/index.js",
   "types": "lib/index.d.ts",
   "files": [
-    "lib"
+    "lib",
+    "src"
   ],
   "scripts": {
-    "test": "npm run test:js",
+    "test": "yarn run test:js",
     "test:js": "mocha --require ts-node/register tests/*-test.ts",
     "test:js:debug": "mocha debug --require ts-node/register tests/*-test.ts",
-    "build": "tsc",
-    "prepublish": "tsc"
+    "build": "tsc --build tsconfig.publish.json",
+    "prepublish": "tsc --build tsconfig.publish.json"
   },
   "keywords": [
     "broccoli"
   ],
   "author": "Stefan Penner, David J. Hamilton, Chad Hietala",
   "license": "MIT",
   "dependencies": {
-    "@types/symlink-or-copy": "^1.2.0",
     "heimdalljs-logger": "^0.1.7",
     "object-assign": "^4.1.0",
     "path-posix": "^1.0.0",
@@ -31,6 +31,7 @@
     "@types/fs-extra": "^5.0.4",
     "@types/mocha": "^5.2.5",
     "@types/node": "^10.12.21",
+    "@types/symlink-or-copy": "^1.2.0",
     "chai": "^3.3.0",
     "fs-extra": "^1.0.0",
     "mocha": "^2.3.3",

tests/entry-test.ts

@@ -1,6 +1,6 @@
 import fs = require('fs-extra');
 import chai = require('chai');
-import Entry from '../lib/entry';
+import Entry from '../src/entry';
 
 const { expect } = chai;
 const FIXTURE_DIR = 'fixture';

tests/fs-tree-test.ts

@@ -2,8 +2,8 @@ import fs = require('fs-extra');
 import path = require('path');
 import chai = require('chai');
 import walkSync = require('walk-sync');
-import FSTree  = require('../lib/index');
-import Entry from '../lib/entry';
+import FSTree  = require('../src/index');
+import Entry from '../src/entry';
 
 const { expect } = chai;
 const context = describe;

tests/util-test.ts

@@ -4,8 +4,8 @@ import {
   basename,
   computeImpliedEntries,
   sortAndExpand
-} from '../lib/util';
-import Entry from '../lib/entry';
+} from '../src/util';
+import Entry from '../src/entry';
 
 const { expect } = chai;
 

tsconfig.publish.json

@@ -0,0 +1,19 @@
+{
+  "compilerOptions": {
+    "composite": true,
+    "rootDir": "src",
+    "outDir": "lib",
+    "declaration": true,
+    "declarationMap": true,
+    "sourceMap": true,
+    "strict": true,
+    "moduleResolution": "node",
+    "module": "commonjs",
+    "target": "es5",
+    "paths": {
+      "*": ["types/*"]
+    },
+    "baseUrl": "."
+  },
+  "include": ["src"]
+}

yarn.lock

@@ -250,9 +250,9 @@ sigmund@~1.0.0:
   resolved "https://registry.yarnpkg.com/sigmund/-/sigmund-1.0.1.tgz#3ff21f198cad2175f9f3b781853fd94d0d19b590"
 
 source-map-support@^0.5.6:
-  version "0.5.10"
-  resolved "https://registry.yarnpkg.com/source-map-support/-/source-map-support-0.5.10.tgz#2214080bc9d51832511ee2bab96e3c2f9353120c"
-  integrity sha512-YfQ3tQFTK/yzlGJuX8pTwa4tifQj4QS2Mj7UegOu8jAz59MqIiMGPXxQhVQiIMNzayuUSF/jEuVnfFF5JqybmQ==
+  version "0.5.12"
+  resolved "https://registry.yarnpkg.com/source-map-support/-/source-map-support-0.5.12.tgz#b4f3b10d51857a5af0138d3ce8003b201613d599"
+  integrity sha512-4h2Pbvyy15EE02G+JOZpUCmqWJuqrs+sEkzewTm++BPi7Hvn/HwcqLAcNxYAyI0x13CpPPn+kMjl+hplXMHITQ==
   dependencies:
     buffer-from "^1.0.0"
     source-map "^0.6.0"
@@ -275,9 +275,9 @@ to-iso-string@0.0.2:
   resolved "https://registry.yarnpkg.com/to-iso-string/-/to-iso-string-0.0.2.tgz#4dc19e664dfccbe25bd8db508b00c6da158255d1"
 
 ts-node@^8.0.2:
-  version "8.0.2"
-  resolved "https://registry.yarnpkg.com/ts-node/-/ts-node-8.0.2.tgz#9ecdf8d782a0ca4c80d1d641cbb236af4ac1b756"
-  integrity sha512-MosTrinKmaAcWgO8tqMjMJB22h+sp3Rd1i4fdoWY4mhBDekOwIAKI/bzmRi7IcbCmjquccYg2gcF6NBkLgr0Tw==
+  version "8.1.0"
+  resolved "https://registry.yarnpkg.com/ts-node/-/ts-node-8.1.0.tgz#8c4b37036abd448577db22a061fd7a67d47e658e"
+  integrity sha512-34jpuOrxDuf+O6iW1JpgTRDFynUZ1iEqtYruBqh35gICNjN8x+LpVcPAcwzLPi9VU6mdA3ym+x233nZmZp445A==
   dependencies:
     arg "^4.1.0"
     diff "^3.1.0"
@@ -294,9 +294,9 @@ type-detect@^1.0.0:
   resolved "https://registry.yarnpkg.com/type-detect/-/type-detect-1.0.0.tgz#762217cc06db258ec48908a1298e8b95121e8ea2"
 
 typescript@^3.3.3:
-  version "3.3.3"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.3.3.tgz#f1657fc7daa27e1a8930758ace9ae8da31403221"
-  integrity sha512-Y21Xqe54TBVp+VDSNbuDYdGw0BpoR/Q6wo/+35M8PAU0vipahnyduJWirxxdxjsAkS7hue53x2zp8gz7F05u0A==
+  version "3.4.5"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.4.5.tgz#2d2618d10bb566572b8d7aad5180d84257d70a99"
+  integrity sha512-YycBxUb49UUhdNMU5aJ7z5Ej2XGmaIBL0x34vZ82fn3hGvD+bgrMrVDpatgz2f7YxUMJxMkbWxJZeAvDxVe7Vw==
 
 walk-sync@^0.3.1:
   version "0.3.4"
@@ -306,6 +306,6 @@ walk-sync@^0.3.1:
     matcher-collection "^1.0.0"
 
 yn@^3.0.0:
-  version "3.0.0"
-  resolved "https://registry.yarnpkg.com/yn/-/yn-3.0.0.tgz#0073c6b56e92aed652fbdfd62431f2d6b9a7a091"
-  integrity sha512-+Wo/p5VRfxUgBUGy2j/6KX2mj9AYJWOHuhMjMcbBFc3y54o9/4buK1ksBvuiK01C3kby8DH9lSmJdSxw+4G/2Q==
+  version "3.1.0"
+  resolved "https://registry.yarnpkg.com/yn/-/yn-3.1.0.tgz#fcbe2db63610361afcc5eb9e0ac91e976d046114"
+  integrity sha512-kKfnnYkbTfrAdd0xICNFw7Atm8nKpLcLv9AZGEt+kczL/WQVai4e2V6ZN8U/O+iI6WrNuJjNNOyu4zfhl9D3Hg==