Upgrade hallmark devDependency from ^1.0.0 to ^2.0.0 (#58)

* Upgrade hallmark devDependency from ^1.0.0 to ^2.0.0
* Remove empty Unreleased section from changelog
* Fix GitHub links
* Add `git fetch --tags` to Travis for historical tags

.travis.yml

@@ -6,3 +6,4 @@ node_js:
   - 10
 
 after_success: npm run coverage
+before_script: git fetch --tags

CHANGELOG.md

@@ -2,8 +2,6 @@
 
 _**If you are upgrading:** please see [`UPGRADING.md`](UPGRADING.md)._
 
-## [Unreleased][unreleased]
-
 ## [4.0.0] - 2019-03-30
 
 ### Changed
@@ -118,20 +116,18 @@ _**If you are upgrading:** please see [`UPGRADING.md`](UPGRADING.md)._
 
 :seedling: Initial release.
 
-[unreleased]: https://github.com/level/mem/compare/v4.0.0...HEAD
-
-[4.0.0]: https://github.com/level/mem/compare/v3.0.1...v4.0.0
+[4.0.0]: https://github.com/Level/mem/compare/v3.0.1...v4.0.0
 
-[3.0.1]: https://github.com/level/mem/compare/v3.0.0...v3.0.1
+[3.0.1]: https://github.com/Level/mem/compare/v3.0.0...v3.0.1
 
-[3.0.0]: https://github.com/level/mem/compare/v2.0.0...v3.0.0
+[3.0.0]: https://github.com/Level/mem/compare/v2.0.0...v3.0.0
 
-[2.0.0]: https://github.com/level/mem/compare/v1.0.2...v2.0.0
+[2.0.0]: https://github.com/Level/mem/compare/v1.0.2...v2.0.0
 
-[1.0.2]: https://github.com/level/mem/compare/v1.0.1...v1.0.2
+[1.0.2]: https://github.com/Level/mem/compare/v1.0.1...v1.0.2
 
-[1.0.1]: https://github.com/level/mem/compare/v1.0.0...v1.0.1
+[1.0.1]: https://github.com/Level/mem/compare/v1.0.0...v1.0.1
 
-[1.0.0]: https://github.com/level/mem/compare/v0.18.0...v1.0.0
+[1.0.0]: https://github.com/Level/mem/compare/v0.18.0...v1.0.0
 
-[0.18.0]: https://github.com/level/mem/compare/0.17.0...v0.18.0
+[0.18.0]: https://github.com/Level/mem/compare/0.17.0...v0.18.0

package.json

@@ -18,7 +18,7 @@
   "devDependencies": {
     "coveralls": "^3.0.2",
     "dependency-check": "^3.3.0",
-    "hallmark": "^1.0.0",
+    "hallmark": "^2.0.0",
     "level-community": "^3.0.0",
     "nyc": "^14.0.0",
     "standard": "^14.0.0",