Get code compiling again

Changes due to PureScript 0.15
1. Remove constraints from foreign imports.
2. Remove support for records due to the new apartness check.
3. Convert CommonJS to ESmodules

Others:
Format all files.

TODO:
Records are currently not supported because of the new apartness check
in PureScript 0.15. The instance (Typeable (f a)) then partially
overlaps with (Typeable (Record r)). Even though (a::Type) and (r::Row
Type), that still isn't enough for the compiler to disambiguate. There
is no way that I can see to specify an instance for all (f a) where f is
NOT Record.

test/Main.js

@@ -1,5 +1,5 @@
-exports.clog = function(x) {
-    return function() {
-        console.log(x);
-    };
-};
+export function clog(x) {
+  return function() {
+    console.log(x);
+  };
+}