babylon: throw parse error if class properties do not have a semicolon (fixes T6873)

test/fixtures/experimental/class-properties/semicolons-required-with-value/actual.js

@@ -0,0 +1,3 @@
+class A {
+  asdf = 1
+}

test/fixtures/experimental/class-properties/semicolons-required-with-value/options.json

@@ -0,0 +1,4 @@
+{
+  "throws": "A semicolon is required after a class property (3:0)",
+  "plugins": ["classProperties"]
+}

test/fixtures/experimental/class-properties/semicolons-required-without-value/actual.js

@@ -0,0 +1,3 @@
+class A {
+  asdf
+}

test/fixtures/experimental/class-properties/semicolons-required-without-value/options.json

@@ -0,0 +1,4 @@
+{
+  "throws": "A semicolon is required after a class property (3:0)",
+  "plugins": ["classProperties"]
+}