Add project file and drop pre-1.0 support

[ludvigak]

No description provided.

[coveralls]

Pull Request Test Coverage Report for Build 81

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage decreased (-1.4%) to 92.381%

---

Files with Coverage Reduction	New Missed Lines	%
src/FINUFFT.jl	1	78.23%

Totals
Change from base Build 79:	-1.4%
Covered Lines:	97
Relevant Lines:	105

---

💛 - Coveralls

[coveralls]

Pull Request Test Coverage Report for Build 81

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage decreased (-1.4%) to 92.381%

---

Files with Coverage Reduction	New Missed Lines	%
src/FINUFFT.jl	1	78.23%

Totals
Change from base Build 79:	-1.4%
Covered Lines:	97
Relevant Lines:	105

---

💛 - Coveralls

[coveralls]

Pull Request Test Coverage Report for Build 81

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage decreased (-1.4%) to 92.381%

---

Files with Coverage Reduction	New Missed Lines	%
src/FINUFFT.jl	1	78.23%

Totals
Change from base Build 79:	-1.4%
Covered Lines:	97
Relevant Lines:	105

---

💛 - Coveralls

[coveralls]

Pull Request Test Coverage Report for Build 81

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage decreased (-1.4%) to 92.381%

---

Files with Coverage Reduction	New Missed Lines	%
src/FINUFFT.jl	1	78.23%

Totals
Change from base Build 79:	-1.4%
Covered Lines:	97
Relevant Lines:	105

---

💛 - Coveralls