chore: improve build process, run tests on jest

Author: sularome

.gitignore

@@ -40,5 +40,5 @@ jspm_packages
 
 # Webstorm
 .idea
-build/
+dist/
 typings/

index.html

@@ -0,0 +1,9 @@
+{
+    "transform": {
+      "^.+\\.(t|j)sx?$": "ts-jest"
+    },
+    "testRegex": "(/tests/.*|(\\.|/)(test|spec))\\.(jsx?|tsx?)$",
+    "moduleFileExtensions": ["ts", "tsx", "js", "jsx", "json", "node"],
+    "collectCoverage": true,
+    "coverageDirectory": "coverage"
+  }