Added test cases for babel-generator (#5934)

* edited .gitignore to ignore all package-lock.json files

packages/babel-generator/test/fixtures/types/Literal/actual.js

@@ -11,3 +11,4 @@ false;
 0o70;
 0X1F;
 -0b1111011;
+"use strict";

packages/babel-generator/test/fixtures/types/Literal/expected.js

@@ -11,3 +11,4 @@ false;
 0o70;
 0X1F;
 -0b1111011;
+"use strict";

packages/babel-generator/test/fixtures/types/LogicalExpression/actual.js

@@ -1,2 +1,4 @@
 foo ||bar;
 (x => x)|| bar;
+(function a(x){return x;})|| 2;
+0||(function(){return alpha;});

packages/babel-generator/test/fixtures/types/LogicalExpression/expected.js

@@ -1,2 +1,10 @@
 foo || bar;
 (x => x) || bar;
+
+(function a(x) {
+  return x;
+}) || 2;
+
+0 || function () {
+  return alpha;
+};