chore(deps): upgrade deps and use ^ (#93)

I've long held that locking down deps to a specific version was a good
idea. But now I'm thinking that it's not worth the cost (also it doesn't
really take care of transitive deps anyway).

I've noticed build breakages recently. I believe that this will fix it.
Maybe...

package.json

@@ -21,45 +21,45 @@
   "author": "Kent C. Dodds <kent@doddsfamily.us> (http://kentcdodds.com/)",
   "license": "MIT",
   "dependencies": {
-    "arrify": "1.0.1",
-    "bluebird": "3.4.7",
-    "colors": "1.1.2",
-    "commander": "2.9.0",
-    "find-up": "2.1.0",
-    "js-yaml": "3.7.0",
-    "lodash": "4.17.4",
-    "manage-path": "2.0.0",
-    "omelette": "0.3.1",
-    "prefix-matches": "0.0.9",
-    "readline-sync": "1.4.5",
-    "shell-escape": "0.2.0",
-    "spawn-command-with-kill": "1.0.0"
+    "arrify": "^1.0.1",
+    "bluebird": "^3.4.7",
+    "colors": "^1.1.2",
+    "commander": "^2.9.0",
+    "find-up": "^2.1.0",
+    "js-yaml": "^3.7.0",
+    "lodash": "^4.17.4",
+    "manage-path": "^2.0.0",
+    "omelette": "^0.3.1",
+    "prefix-matches": "^0.0.9",
+    "readline-sync": "^1.4.6",
+    "shell-escape": "^0.2.0",
+    "spawn-command-with-kill": "^1.0.0"
   },
   "devDependencies": {
-    "all-contributors-cli": "3.0.7",
-    "babel-cli": "6.18.0",
-    "babel-eslint": "7.1.1",
-    "babel-jest": "18.0.0",
-    "babel-plugin-module-resolver": "2.4.0",
-    "babel-preset-es2015": "6.18.0",
-    "babel-preset-stage-2": "6.18.0",
-    "babel-register": "6.18.0",
-    "cli-tester": "2.0.0",
-    "codecov": "1.0.1",
-    "commitizen": "2.9.3",
-    "condition-node-version": "1.3.0",
-    "cross-env": "3.1.4",
-    "cz-conventional-changelog": "1.2.0",
-    "eslint": "3.12.2",
-    "eslint-config-kentcdodds": "11.1.0",
-    "husky": "0.12.0",
-    "jest-cli": "18.1.0",
-    "opt-cli": "1.5.1",
+    "all-contributors-cli": "^3.1.0",
+    "babel-cli": "^6.22.2",
+    "babel-eslint": "^7.1.1",
+    "babel-jest": "^18.0.0",
+    "babel-plugin-module-resolver": "^2.5.0",
+    "babel-preset-es2015": "^6.22.0",
+    "babel-preset-stage-2": "^6.22.0",
+    "babel-register": "^6.22.0",
+    "cli-tester": "^2.0.0",
+    "codecov": "^1.0.1",
+    "commitizen": "^2.9.5",
+    "condition-node-version": "^1.3.0",
+    "cross-env": "^3.1.4",
+    "cz-conventional-changelog": "^1.2.0",
+    "eslint": "^3.15.0",
+    "eslint-config-kentcdodds": "^11.1.0",
+    "husky": "^0.13.1",
+    "jest-cli": "^18.1.0",
+    "opt-cli": "^1.5.1",
     "p-s": "*",
-    "rimraf": "2.5.4",
-    "semantic-release": "6.3.2",
-    "sinon": "1.17.7",
-    "validate-commit-msg": "2.8.2"
+    "rimraf": "^2.5.4",
+    "semantic-release": "^6.3.6",
+    "sinon": "^1.17.7",
+    "validate-commit-msg": "^2.11.1"
   },
   "eslintConfig": {
     "extends": [