fix(release): add changelog autogeneration and NPM tarball

.releaserc

@@ -0,0 +1,21 @@
+{
+  "plugins": [
+    "@semantic-release/commit-analyzer",
+    "@semantic-release/release-notes-generator",
+    ["@semantic-release/changelog", {
+      "changelogFile": "CHANGELOG.md",
+      "changelogTitle": "# NgxTesting - Changelog"
+    }],
+    ["@semantic-release/npm", {
+      "pkgRoot": "dist/ngx-testing",
+      "tarballDir": "dist"
+    }],
+    ["@semantic-release/git", {
+      "assets": ["CHANGELOG.md"],
+      "message": "docs(changelog): add changes of ${nextRelease.version} [skip ci]"
+    }],
+    ["@semantic-release/github", {
+      "assets": "dist/*.tgz"
+    }]
+  ]
+}

package.json

@@ -20,10 +20,9 @@
     "format": "npm-run-all -p format:*",
     "format:code": "prettier --write \"projects/**/*.{ts,js,json,?css}\"",
     "format:html": "prettyhtml \"projects/**/*.html\"",
-    "pack": "npm run build",
-    "postpack": "copyfiles LICENSE README.md dist/ngx-testing",
-    "presemantic-release": "npm run pack",
-    "semantic-release": "cd dist/ngx-testing && semantic-release"
+    "pack": "copyfiles LICENSE README.md dist/ngx-testing",
+    "presemantic-release": "npm run build && npm run pack",
+    "semantic-release": "semantic-release"
   },
   "private": true,
   "dependencies": {
@@ -47,6 +46,12 @@
     "@angular/language-service": "~7.1.0",
     "@commitlint/cli": "^7.2.1",
     "@commitlint/config-conventional": "^7.1.2",
+    "@semantic-release/changelog": "^3.0.2",
+    "@semantic-release/commit-analyzer": "^6.1.0",
+    "@semantic-release/git": "^7.0.8",
+    "@semantic-release/github": "^5.2.9",
+    "@semantic-release/npm": "^5.1.4",
+    "@semantic-release/release-notes-generator": "^7.1.4",
     "@starptech/prettyhtml": "^0.8.16",
     "@types/jasmine": "~2.8.8",
     "@types/jasminewd2": "~2.0.3",