Minor release with fixes for memleaks - thanks to @flgh

Minor release with fixes for memleaks

rebuild function stubs

bump PHP_SECP256K1_VERSION

Minor release, v0.1.3

Contains a fix for an urgent bug.
For release notes, see docs: docs/release-notes-v0.1.3.md

Minor release with ecdsa_signature_parse_der_lax()

Remove Schnorr module - see bitcoin-core/secp256k1@80773a6

Remove Schnorr module - see bitcoin-core/secp256k1@80773a6

Release featuring PHP7 support

Minor release, most recent PHP5.6 version