added onDoubleTap and onLongPress gestures

[ph1lw]

No description provided.

[coveralls]

Pull Request Test Coverage Report for Build 56

• 2 of 7 (28.57%) changed or added relevant lines in 2 files are covered.
• 54 unchanged lines in 1 file lost coverage.
• Overall coverage decreased (-0.4%) to 59.293%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
lib/src/swiper.dart	1	6	16.67%

Files with Coverage Reduction	New Missed Lines	%
lib/src/custom_layout.dart	54	47.12%

Totals
Change from base Build 53:	-0.4%
Covered Lines:	386
Relevant Lines:	651

---

💛 - Coveralls

[coveralls]

Pull Request Test Coverage Report for Build 57

• 3 of 8 (37.5%) changed or added relevant lines in 2 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.3%) to 59.356%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
lib/src/swiper.dart	1	6	16.67%

Totals
Change from base Build 53:	-0.3%
Covered Lines:	387
Relevant Lines:	652

---

💛 - Coveralls