Upgrade to Jackson 2.5.4

2.5.4 (09-Jun-2015)

No changes.

2.5.3 (24-Apr-2015)

#191: Longest collision chain in symbol table now exceeds maximum -- suspect a DoS attack
 (reported by Paul D)

2.5.2 (29-Mar-2015)

#181: Failure parsing -Infinity on buffer boundary
 (reported by brharrington@github)
#187: Longest collision chain in symbol table exceeds maximum length routinely
  in non-malicious code
 (reported by mazzaferri@github)

2.5.1 (06-Feb-2015)

#178: Add `Lf2SpacesIndenter.withLinefeed` back to keep binary-compatibility with 2.4.x
 (reported by ansell@github)
- Minor fix to alignment of null bytes in the last 4 bytes of name, in case where name
  may cross the input boundary

2.5.0 (01-Jan-2015)

#148: BytesToNameCanonicalizer can mishandle leading null byte(s).
 (reported by rjmac@github)
#164: Add `JsonGenerator.Feature.IGNORE_UNKNOWN` (but support via individual
  data format modules)
#166: Allow to configure line endings and indentation
 (contributed by Aaron D)
#167: `JsonGenerator` not catching problem of writing field name twice in a row
#168: Add methods in `JsonStreamContext` for keeping track of "current value"
#169: Add `JsonPointer.head()`
 (contributed by Alex S, lordofthejars@github)
- Added `ResolvedType.getParameterSource()` to support better resolution
 of generic types.
- Added `JsonGenerator.writeRawValue(SerializableString)`
- Added `JsonParser.hasExpectedStartObjectToken()` convenience method
- Added `JsonParser.hasTokenId(id)` convenience method
- Added `JsonParser.nextFieldName()` (no args)

2.4.6 (not released yet)

#184: WRITE_NUMBERS_AS_STRINGS disables WRITE_BIGDECIMAL_AS_PLAIN
 (reported by Derek C)

2.4.5 (13-Jan-2015)

No changes since 2.4.4.

2.4.4 (24-Nov-2014)

#157: ArrayIndexOutOfBoundsException: 200 on numbers with more than 200 digits.
 (reported by Lars P, larsp@github)
#173: An exception is thrown for a valid JsonPointer expression
 (reported by Alex S)
#176: `JsonPointer` should not consider "00" to be valid index
 (reported by fge@gitub)
- Fix `JsonGenerator.setFeatureMask()` to better handle dynamic changes.

2.4.3 (02-Oct-2014)

#152: Exception for property names longer than 256k
 (reported by CrendKing@github)

2.4.2 (13-Aug-2014)

#145: NPE at BytesToNameCanonicalizer
 (reported by Shay B)
#146: Error while parsing negative floats at the end of the input buffer
 (reported by rjmac@github)

2.4.1 (16-Jun-2014)

#143: Flaw in `BufferRecycler.allocByteBuffer(int,int)` that results in
 performance regression

2.4.0 (29-May-2014)

#121: Increase size of low-level byte[]/char[] input/output buffers
 (from 4k->8k for bytes, 2k->4k for chars)
#127: Add `JsonGenerator.writeStartArray(int size)` for binary formats
#138: Add support for using `char[]` as input source; optimize handling
  of `String` input as well.
- Refactor `BufferRecycler` to eliminate helper enums