Public static fields in ScalarInfo were exposing mutable collections
that are obviously not intended to be modified. Switch to immutable
collection types to avoid accidental mutation.

* Add full error message for NonNullableValueCoercedAsNullException

* Add tests for improved NonNullableValueCoercedAsNullException

* Remove empty path and improve grammar

Public static fields in DirectiveInfo were exposing mutable collections
that are obviously not intended to be modified. Switch to immutable
collection types to avoid accidental mutation.

Replace Stack with ArrayDeque in TypeInfo.

Fix instances where too many or too few arguments were supplied to String.format.

…#2778)

* GraphQL Specification link updated

* http to https

…t some values can be null (#2784)

This commit adds the ability to ignore single-line comments during AST conversion.

Fixes #2767

DelegatingDataFetchingEnvironment was missing Deprecated and Override annotations.

Fix a few occurrences where a Map or Set was initialized with an initial capacity
value N, and then immediately filled with N items, which would always trigger
a resize.

There were a few instances where inner classes were used unnecessarily over
static inner classes.

* Fix AstPrinter to print field descriptions

* consider compact mode

* fix autoformatted lines

* fix autoformatted imports

* fix `IntrospectionResultToSchemaTest.groovy` test

* fix `IntrospectionResultToSchemaTest.groovy` test

Make some static fields final, and avoid unnecessary boxing in UnicodeUtils.

* Investigation of NonNullableValueCoercedAsNullException is being thrown in MaxQueryDepthInstrumentation

* MaxQueryDepthInstrumentation and MaxQueryComplexityInstrumentation now are called at execution time not after validation

* use atomic ref