feat: add flow type annotations

.flowconfig

@@ -0,0 +1,9 @@
+[ignore]
+.*/node_modules/documentation/*
+
+[libs]
+
+[include]
+
+[options]
+suppress_comment= \\(.\\|\n\\)*\\@FlowIgnore

.gitignore

@@ -35,3 +35,4 @@ node_modules
 
 dist
 docs
+lib

appveyor.yml

@@ -24,6 +24,7 @@ install:
   - npm install
 
 test_script:
+  - npm run build:node
   - npm run test:node
 
 build: off

package.json

@@ -3,19 +3,21 @@
   "version": "0.4.13",
   "description": "multihash implementation",
   "lead-maintainer": "David Dias <daviddias@ipfs.io>",
-  "main": "src/index.js",
+  "main": "lib/index.js",
   "scripts": {
     "lint": "aegir lint",
-    "test:browser": "aegir test --target browser",
-    "test:node": "aegir test --target node",
+    "test:browser": "npm run build:node && aegir test --target browser",
+    "test:node": "npm run build:node && aegir test --target node",
     "build": "aegir build",
-    "test": "aegir test",
+    "test": "npm run build:node && aegir test",
     "docs": "aegir docs",
     "release": "aegir release --docs",
     "release-minor": "aegir release --type minor --docs",
     "release-major": "aegir release --type major --docs",
     "coverage": "aegir coverage",
-    "coverage-publish": "aegir coverage --provider coveralls"
+    "coverage-publish": "aegir coverage --provider coveralls",
+    "build:node": "aegir build --no-dist",
+    "start": "aegir build --watch --no-dist"
   },
   "pre-commit": [
     "lint",
@@ -42,7 +44,7 @@
     "varint": "^5.0.0"
   },
   "devDependencies": {
-    "aegir": "^12.3.0",
+    "aegir": "git+https://github.com/ipfs/aegir#flow",
     "buffer-equal": "1.0.0",
     "chai": "^4.1.2",
     "dirty-chai": "^2.0.1",